构建自个儿的PHP框架-实现Model类(3)
model
static
构建自己的PHP框架--实现Model类(3)
在之前的博客中，我们实现并完善了Model类的findOne方法，下面我们来实现其中的其他方法。
先来看findAll方法，这个方法和findOne很相似。
<code class="sourceCode php"> <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> findOne<span class="ot">(</span><span class="kw">$condition</span> = <span class="kw">null</span><span class="ot">)</span> { <span class="kw">$sql</span> = <span class="st">'select * from '</span> . <span class="kw">static</span>::tableName<span class="ot">();</span> <span class="kw">$params</span> = <span class="ot">[];</span> <span class="co">// 判空</span> <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$condition</span><span class="ot">))</span> { <span class="kw">$sql</span> .= <span class="st">' where '</span><span class="ot">;</span> <span class="kw">$params</span> = <span class="fu">array_values</span><span class="ot">(</span><span class="kw">$condition</span><span class="ot">);</span> <span class="kw">$keys</span> = <span class="ot">[];</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$condition</span> <span class="kw">as</span> <span class="kw">$key</span> => <span class="kw">$value</span><span class="ot">)</span> { <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$keys</span><span class="ot">,</span> <span class="st">"</span><span class="kw">$key</span><span class="st"> = ?"</span><span class="ot">);</span> } <span class="kw">$sql</span> .= <span class="fu">implode</span><span class="ot">(</span><span class="st">' and '</span><span class="ot">,</span> <span class="kw">$keys</span><span class="ot">);</span> } <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span> <span class="kw">$rs</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span> <span class="kw">$models</span> = <span class="ot">[];</span> <span class="kw">if</span> <span class="ot">(</span><span class="kw">$rs</span><span class="ot">)</span> { <span class="co">// 直接获取出所有符合条件的</span> <span class="kw">$rows</span> = <span class="kw">$stmt</span>->fetchAll<span class="ot">(</span><span class="kw">PDO</span>::<span class="kw">FETCH_ASSOC</span><span class="ot">);</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$rows</span> <span class="kw">as</span> <span class="kw">$row</span><span class="ot">)</span> { <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$row</span><span class="ot">))</span> { <span class="kw">$model</span> = <span class="kw">new</span> <span class="kw">static</span><span class="ot">();</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$row</span> <span class="kw">as</span> <span class="kw">$rowKey</span> => <span class="kw">$rowValue</span><span class="ot">)</span> { <span class="kw">$model</span>-><span class="kw">$rowKey</span> = <span class="kw">$rowValue</span><span class="ot">;</span> } <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$models</span><span class="ot">,</span> <span class="kw">$model</span><span class="ot">);</span> } } } <span class="kw">return</span> <span class="kw">null</span><span class="ot">;</span> }</code>Copy after login
你会发现有findOne和findAll方法很相似，明显可以将公共的部分抽出来，然后我们就多了如下两个方法：
<code class="sourceCode php"> <span class="co">/**</span><span class="co"> * Build a sql where part</span><span class="co"> * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">mixed</span><span class="co"> $condition a set of column values</span><span class="co"> * </span><span class="kw">@return</span><span class="co"> string</span><span class="co"> */</span> <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> buildWhere<span class="ot">(</span><span class="kw">$condition</span><span class="ot">,</span> <span class="kw">$params</span> = <span class="kw">null</span><span class="ot">)</span> { <span class="kw">if</span> <span class="ot">(</span><span class="fu">is_null</span><span class="ot">(</span><span class="kw">$params</span><span class="ot">))</span> { <span class="kw">$params</span> = <span class="ot">[];</span> } <span class="kw">$where</span> = <span class="st">''</span><span class="ot">;</span> <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$condition</span><span class="ot">))</span> { <span class="kw">$where</span> .= <span class="st">' where '</span><span class="ot">;</span> <span class="kw">$keys</span> = <span class="ot">[];</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$condition</span> <span class="kw">as</span> <span class="kw">$key</span> => <span class="kw">$value</span><span class="ot">)</span> { <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$keys</span><span class="ot">,</span> <span class="st">"</span><span class="kw">$key</span><span class="st"> = ?"</span><span class="ot">);</span> <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$params</span><span class="ot">,</span> <span class="kw">$value</span><span class="ot">);</span> } <span class="kw">$where</span> .= <span class="fu">implode</span><span class="ot">(</span><span class="st">' and '</span><span class="ot">,</span> <span class="kw">$keys</span><span class="ot">);</span> } <span class="kw">return</span> <span class="ot">[</span><span class="kw">$where</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">];</span> } <span class="co">/**</span><span class="co"> * Convert array to model</span><span class="co"> * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">mixed</span><span class="co"> $row the row data from database</span><span class="co"> */</span> <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> arr2Model<span class="ot">(</span><span class="kw">$row</span><span class="ot">)</span> { <span class="kw">$model</span> = <span class="kw">new</span> <span class="kw">static</span><span class="ot">();</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$row</span> <span class="kw">as</span> <span class="kw">$rowKey</span> => <span class="kw">$rowValue</span><span class="ot">)</span> { <span class="kw">$model</span>-><span class="kw">$rowKey</span> = <span class="kw">$rowValue</span><span class="ot">;</span> } <span class="kw">return</span> <span class="kw">$model</span><span class="ot">;</span> }</code>Copy after login
分别是构建sql中where部分的方法和将查找到的Array转换成Model的方法。大家会奇怪第一个方法中为什么需要params参数和返回值，其实这个为了之后的updateAll方法的使用。其实这个地方跟适合使用引用传值。
这样我们的findOne和findAll就便成了如下内容：
<code class="sourceCode php"> <span class="co">/**</span><span class="co"> * Returns a single model instance by a primary key or an array of column values.</span><span class="co"> *</span><span class="co"> * ```php</span><span class="co"> * // find the first customer whose age is 30 and whose status is 1</span><span class="co"> * $customer = Customer::findOne(['age' => 30, 'status' => 1]);</span><span class="co"> * ```</span><span class="co"> *</span><span class="co"> * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">mixed</span><span class="co"> $condition a set of column values</span><span class="co"> * </span><span class="kw">@return</span><span class="co"> static|null Model instance matching the condition, or null if nothing matches.</span><span class="co"> */</span> <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> findOne<span class="ot">(</span><span class="kw">$condition</span> = <span class="kw">null</span><span class="ot">)</span> { <span class="fu">list</span><span class="ot">(</span><span class="kw">$where</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">)</span> = <span class="kw">static</span>::buildWhere<span class="ot">(</span><span class="kw">$condition</span><span class="ot">);</span> <span class="kw">$sql</span> = <span class="st">'select * from '</span> . <span class="kw">static</span>::tableName<span class="ot">()</span> . <span class="kw">$where</span><span class="ot">;</span> <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span> <span class="kw">$rs</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span> <span class="kw">if</span> <span class="ot">(</span><span class="kw">$rs</span><span class="ot">)</span> { <span class="kw">$row</span> = <span class="kw">$stmt</span>->fetch<span class="ot">(</span><span class="kw">PDO</span>::<span class="kw">FETCH_ASSOC</span><span class="ot">);</span> <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$row</span><span class="ot">))</span> { <span class="kw">return</span> <span class="kw">static</span>::arr2Model<span class="ot">(</span><span class="kw">$row</span><span class="ot">);</span> } } <span class="kw">return</span> <span class="kw">null</span><span class="ot">;</span> } <span class="co">/**</span><span class="co"> * Returns a list of models that match the specified primary key value(s) or a set of column values.</span><span class="co"> *</span><span class="co"> * ```php</span><span class="co"> * // find customers whose age is 30 and whose status is 1</span><span class="co"> * $customers = Customer::findAll(['age' => 30, 'status' => 1]);</span><span class="co"> * ```</span><span class="co"> *</span><span class="co"> * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">mixed</span><span class="co"> $condition a set of column values</span><span class="co"> * </span><span class="kw">@return</span><span class="co"> array an array of Model instance, or an empty array if nothing matches.</span><span class="co"> */</span> <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> findAll<span class="ot">(</span><span class="kw">$condition</span> = <span class="kw">null</span><span class="ot">)</span> { <span class="fu">list</span><span class="ot">(</span><span class="kw">$where</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">)</span> = <span class="kw">static</span>::buildWhere<span class="ot">(</span><span class="kw">$condition</span><span class="ot">);</span> <span class="kw">$sql</span> = <span class="st">'select * from '</span> . <span class="kw">static</span>::tableName<span class="ot">()</span> . <span class="kw">$where</span><span class="ot">;</span> <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span> <span class="kw">$rs</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span> <span class="kw">$models</span> = <span class="ot">[];</span> <span class="kw">if</span> <span class="ot">(</span><span class="kw">$rs</span><span class="ot">)</span> { <span class="kw">$rows</span> = <span class="kw">$stmt</span>->fetchAll<span class="ot">(</span><span class="kw">PDO</span>::<span class="kw">FETCH_ASSOC</span><span class="ot">);</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$rows</span> <span class="kw">as</span> <span class="kw">$row</span><span class="ot">)</span> { <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$row</span><span class="ot">))</span> { <span class="kw">$model</span> = <span class="kw">static</span>::arr2Model<span class="ot">(</span><span class="kw">$row</span><span class="ot">);</span> <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$models</span><span class="ot">,</span> <span class="kw">$model</span><span class="ot">);</span> } } } <span class="kw">return</span> <span class="kw">$models</span><span class="ot">;</span> }</code>Copy after login
剩下的updateAll/deleteAll/insert/update和delete方法就不一一详细说明了，直接给出代码。其基本思想都是一致的，都是按照规则拼接SQL语句。
<code class="sourceCode php"> <span class="co">/**</span><span class="co"> * Updates models using the provided attribute values and conditions.</span><span class="co"> * For example, to change the status to be 2 for all customers whose status is 1:</span><span class="co"> *</span><span class="co"> * ~~~</span><span class="co"> * Customer::updateAll(['status' => 1], ['status' => '2']);</span><span class="co"> * ~~~</span><span class="co"> *</span><span class="co"> * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">array</span><span class="co"> $attributes attribute values (name-value pairs) to be saved for the model.</span><span class="co"> * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">array</span><span class="co"> $condition the condition that matches the models that should get updated.</span><span class="co"> * An empty condition will match all models.</span><span class="co"> * </span><span class="kw">@return</span><span class="co"> integer the number of rows updated</span><span class="co"> */</span> <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> updateAll<span class="ot">(</span><span class="kw">$condition</span><span class="ot">,</span> <span class="kw">$attributes</span><span class="ot">)</span> { <span class="kw">$sql</span> = <span class="st">'update '</span> . <span class="kw">static</span>::tableName<span class="ot">();</span> <span class="kw">$params</span> = <span class="ot">[];</span> <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$attributes</span><span class="ot">))</span> { <span class="kw">$sql</span> .= <span class="st">' set '</span><span class="ot">;</span> <span class="kw">$params</span> = <span class="fu">array_values</span><span class="ot">(</span><span class="kw">$attributes</span><span class="ot">);</span> <span class="kw">$keys</span> = <span class="ot">[];</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$attributes</span> <span class="kw">as</span> <span class="kw">$key</span> => <span class="kw">$value</span><span class="ot">)</span> { <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$keys</span><span class="ot">,</span> <span class="st">"</span><span class="kw">$key</span><span class="st"> = ?"</span><span class="ot">);</span> } <span class="kw">$sql</span> .= <span class="fu">implode</span><span class="ot">(</span><span class="st">' , '</span><span class="ot">,</span> <span class="kw">$keys</span><span class="ot">);</span> } <span class="fu">list</span><span class="ot">(</span><span class="kw">$where</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">)</span> = <span class="kw">static</span>::buildWhere<span class="ot">(</span><span class="kw">$condition</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">);</span> <span class="kw">$sql</span> .= <span class="kw">$where</span><span class="ot">;</span> <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span> <span class="kw">$execResult</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span> <span class="kw">if</span> <span class="ot">(</span><span class="kw">$execResult</span><span class="ot">)</span> { <span class="co">// 获取更新的行数</span> <span class="kw">$execResult</span> = <span class="kw">$stmt</span>->rowCount<span class="ot">();</span> } <span class="kw">return</span> <span class="kw">$execResult</span><span class="ot">;</span> } <span class="co">/**</span><span class="co"> * Deletes models using the provided conditions.</span><span class="co"> * WARNING: If you do not specify any condition, this method will delete ALL rows in the table.</span><span class="co"> *</span><span class="co"> * For example, to delete all customers whose status is 3:</span><span class="co"> *</span><span class="co"> * ~~~</span><span class="co"> * Customer::deleteAll([status = 3]);</span><span class="co"> * ~~~</span><span class="co"> *</span><span class="co"> * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">array</span><span class="co"> $condition the condition that matches the models that should get deleted.</span><span class="co"> * An empty condition will match all models.</span><span class="co"> * </span><span class="kw">@return</span><span class="co"> integer the number of rows deleted</span><span class="co"> */</span> <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> deleteAll<span class="ot">(</span><span class="kw">$condition</span><span class="ot">)</span> { <span class="fu">list</span><span class="ot">(</span><span class="kw">$where</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">)</span> = <span class="kw">static</span>::buildWhere<span class="ot">(</span><span class="kw">$condition</span><span class="ot">);</span> <span class="kw">$sql</span> = <span class="st">'delete from '</span> . <span class="kw">static</span>::tableName<span class="ot">()</span> . <span class="kw">$where</span><span class="ot">;</span> <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span> <span class="kw">$execResult</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span> <span class="kw">if</span> <span class="ot">(</span><span class="kw">$execResult</span><span class="ot">)</span> { <span class="co">// 获取删除的行数</span> <span class="kw">$execResult</span> = <span class="kw">$stmt</span>->rowCount<span class="ot">();</span> } <span class="kw">return</span> <span class="kw">$execResult</span><span class="ot">;</span> } <span class="co">/**</span><span class="co"> * Inserts the model into the database using the attribute values of this record.</span><span class="co"> *</span><span class="co"> * Usage example:</span><span class="co"> *</span><span class="co"> * ```php</span><span class="co"> * $customer = new Customer;</span><span class="co"> * $customer->name = $name;</span><span class="co"> * $customer->email = $email;</span><span class="co"> * $customer->insert();</span><span class="co"> * ```</span><span class="co"> *</span><span class="co"> * </span><span class="kw">@return</span><span class="co"> boolean whether the model is inserted successfully.</span><span class="co"> */</span> <span class="kw">public</span> <span class="kw">function</span> insert<span class="ot">()</span> { <span class="kw">$sql</span> = <span class="st">'insert into '</span> . <span class="kw">static</span>::tableName<span class="ot">();</span> <span class="kw">$params</span> = <span class="ot">[];</span> <span class="kw">$keys</span> = <span class="ot">[];</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$this</span> <span class="kw">as</span> <span class="kw">$key</span> => <span class="kw">$value</span><span class="ot">)</span> { <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$keys</span><span class="ot">,</span> <span class="kw">$key</span><span class="ot">);</span> <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$params</span><span class="ot">,</span> <span class="kw">$value</span><span class="ot">);</span> } <span class="co">// 构建由？组成的数组，其个数与参数相等数相同</span> <span class="kw">$holders</span> = <span class="fu">array_fill</span><span class="ot">(</span><span class="dv">0</span><span class="ot">,</span> <span class="fu">count</span><span class="ot">(</span><span class="kw">$keys</span><span class="ot">),</span> <span class="st">'?'</span><span class="ot">);</span> <span class="kw">$sql</span> .= <span class="st">' ('</span> . <span class="fu">implode</span><span class="ot">(</span><span class="st">' , '</span><span class="ot">,</span> <span class="kw">$keys</span><span class="ot">)</span> . <span class="st">') values ( '</span> . <span class="fu">implode</span><span class="ot">(</span><span class="st">' , '</span><span class="ot">,</span> <span class="kw">$holders</span><span class="ot">)</span> . <span class="st">')'</span><span class="ot">;</span> <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span> <span class="kw">$execResult</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span> <span class="co">// 将一些自增值赋回Model中</span> <span class="kw">$primaryKeys</span> = <span class="kw">static</span>::primaryKey<span class="ot">();</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$primaryKeys</span> <span class="kw">as</span> <span class="kw">$name</span><span class="ot">)</span> { <span class="co">// Get the primary key</span> <span class="kw">$lastId</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->lastInsertId<span class="ot">(</span><span class="kw">$name</span><span class="ot">);</span> <span class="kw">$this</span>-><span class="kw">$name</span> = <span class="dt">(int)</span> <span class="kw">$lastId</span><span class="ot">;</span> } <span class="kw">return</span> <span class="kw">$execResult</span><span class="ot">;</span> } <span class="co">/**</span><span class="co"> * Saves the changes to this model into the database.</span><span class="co"> *</span><span class="co"> * Usage example:</span><span class="co"> *</span><span class="co"> * ```php</span><span class="co"> * $customer = Customer::findOne(['id' => $id]);</span><span class="co"> * $customer->name = $name;</span><span class="co"> * $customer->email = $email;</span><span class="co"> * $customer->update();</span><span class="co"> * ```</span><span class="co"> *</span><span class="co"> * </span><span class="kw">@return</span><span class="co"> integer|boolean the number of rows affected.</span><span class="co"> * Note that it is possible that the number of rows affected is 0, even though the</span><span class="co"> * update execution is successful.</span><span class="co"> */</span> <span class="kw">public</span> <span class="kw">function</span> update<span class="ot">()</span> { <span class="kw">$primaryKeys</span> = <span class="kw">static</span>::primaryKey<span class="ot">();</span> <span class="kw">$condition</span> = <span class="ot">[];</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$primaryKeys</span> <span class="kw">as</span> <span class="kw">$name</span><span class="ot">)</span> { <span class="kw">$condition</span><span class="ot">[</span><span class="kw">$name</span><span class="ot">]</span> = <span class="fu">isset</span><span class="ot">(</span><span class="kw">$this</span>-><span class="kw">$name</span><span class="ot">)</span> <span class="ot">?</span> <span class="kw">$this</span>-><span class="kw">$name</span> <span class="ot">:</span> <span class="kw">null</span><span class="ot">;</span> } <span class="kw">$attributes</span> = <span class="ot">[];</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$this</span> <span class="kw">as</span> <span class="kw">$key</span> => <span class="kw">$value</span><span class="ot">)</span> { <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">in_array</span><span class="ot">(</span><span class="kw">$key</span><span class="ot">,</span> <span class="kw">$primaryKeys</span><span class="ot">,</span> <span class="kw">true</span><span class="ot">))</span> { <span class="kw">$attributes</span><span class="ot">[</span><span class="kw">$key</span><span class="ot">]</span> = <span class="kw">$value</span><span class="ot">;</span> } } <span class="kw">return</span> <span class="kw">static</span>::updateAll<span class="ot">(</span><span class="kw">$condition</span><span class="ot">,</span> <span class="kw">$attributes</span><span class="ot">)</span> !== <span class="kw">false</span><span class="ot">;</span> } <span class="co">/**</span><span class="co"> * Deletes the model from the database.</span><span class="co"> *</span><span class="co"> * </span><span class="kw">@return</span><span class="co"> integer|boolean the number of rows deleted.</span><span class="co"> * Note that it is possible that the number of rows deleted is 0, even though the deletion execution is successful.</span><span class="co"> */</span> <span class="kw">public</span> <span class="kw">function</span> delete<span class="ot">()</span> { <span class="kw">$primaryKeys</span> = <span class="kw">static</span>::primaryKey<span class="ot">();</span> <span class="kw">$condition</span> = <span class="ot">[];</span> <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$primaryKeys</span> <span class="kw">as</span> <span class="kw">$name</span><span class="ot">)</span> { <span class="kw">$condition</span><span class="ot">[</span><span class="kw">$name</span><span class="ot">]</span> = <span class="fu">isset</span><span class="ot">(</span><span class="kw">$this</span>-><span class="kw">$name</span><span class="ot">)</span> <span class="ot">?</span> <span class="kw">$this</span>-><span class="kw">$name</span> <span class="ot">:</span> <span class="kw">null</span><span class="ot">;</span> } <span class="kw">return</span> <span class="kw">static</span>::deleteAll<span class="ot">(</span><span class="kw">$condition</span><span class="ot">)</span> !== <span class="kw">false</span><span class="ot">;</span> }</code>Copy after login
这样基本的Model就算是暂时完成了，虽然可能还有很多问题和局限，但暂时先这样了，我们之后有机会会一步一步的去完善。
好了，今天就先到这里。项目内容和博客内容也都会放到Github上，欢迎大家提建议。
code：https://github.com/CraryPrimitiveMan/simple-framework/tree/0.7
blog project：https://github.com/CraryPrimitiveMan/create-your-own-php-framework
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago
By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
1 months ago
By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks ago
By 尊渡假赌尊渡假赌尊渡假赌
How Long Does It Take To Beat Split Fiction?
3 weeks ago
By DDD
R.E.P.O. Save File Location: Where Is It & How to Protect It?
3 weeks ago
By DDD
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Trezor Cold Wallet: Model One and Model T Features and Usage Guide
Jan 19, 2024 pm 04:12 PM
After problems occurred in many centralized exchanges, more and more cryptocurrency investors began to transfer assets to cold wallets to reduce the risks posed by centralized exchanges. This article will introduce Trezor, the world's earliest cold wallet provider. Since the first cold wallet was launched in 2014, it has been sold in many countries around the world. Trezor's products include Model One launched in 2014 and the advanced version Model T launched in 2018. The following will continue to introduce the differences between these two products and other cold wallets. What is Trezor cold wallet? In 2014, Trezor launched the first cold wallet ModelOne. In addition to common BTC, ETH, USDT and other currencies, the wallet also supports more than 1,000 other currencies.
How to use static, this, super, and final in Java
Apr 18, 2023 pm 03:40 PM
1. static Please look at the following program first: publicclassHello{publicstaticvoidmain(String[]args){//(1)System.out.println("Hello, world!");//(2)}} Have seen this Segment programs are familiar to most people who have studied Java. Even if you have not learned Java but have learned other high-level languages, such as C, you should be able to understand the meaning of this code. It simply outputs "Hello, world" and has no other use. However, it shows the main purpose of the static keyword.
What is the function and usage of static in C language
Jan 31, 2024 pm 01:59 PM
The role and usage of static in C language: 1. Variable scope; 2. Life cycle; 3. Internal function; 4. Modify global variables; 5. Modify function; 6. Other uses; Detailed introduction: 1. Variable scope, when If there is the static keyword before a variable, then the scope of the variable is limited to the file in which it is declared. In other words, the variable is a "file-level scope", which is very useful for preventing the "duplicate definition" problem of variables; 2. Life cycle, static variables are initialized once when the program starts executing, and destroyed when the program ends, etc.
Detailed explanation of Model in Django framework
Jun 17, 2023 am 08:48 AM
Django is an open source Python web framework. It adopts the MVT (Model-View-Template) architectural pattern and divides the application into three parts: Model, View and Template. Among them, Model is a basic component in the Django framework, used to define and manage data. This article will provide a detailed explanation of Model in the Django framework. What is Model in Django
The role of static
Jan 24, 2024 pm 04:08 PM
The functions of static: 1. Variables; 2. Methods; 3. Classes; 4. Other uses; 5. Multi-threaded environment; 6. Performance optimization; 7. Singleton mode; 8. Constants; 9. Local variables; 10. Memory Layout optimization; 11. Avoid repeated initialization; 12. Use in functions. Detailed introduction: 1. Variables, static variables. When a variable is declared as static, it belongs to the class level, not the instance level, which means that no matter how many objects are created, only one static variable exists, and all objects share this Static variables and so on.
Practical application scenarios and usage skills of the static keyword in C language
Feb 21, 2024 pm 07:21 PM
Practical application scenarios and usage skills of the static keyword in C language 1. Overview static is a keyword in C language, used to modify variables and functions. Its function is to change its life cycle and visibility during program running, making variables and functions static. This article will introduce the actual application scenarios and usage techniques of the static keyword, and illustrate it through specific code examples. 2. Static variables extend the life cycle of variables. Using the static keyword to modify local variables can extend their life cycle.
How Springboot reads custom pro files and injects static variables
May 30, 2023 am 09:07 AM
Springboot reads the pro file and injects static static variables mailConfig.properties#Server mail.host=smtp.qq.com#Port number mail.port=587#Email account mail.userName=hzy_daybreak_lc@foxmail.com#Email authorization code mail.passWord =vxbkycyjkceocbdc#Time delay mail.timeout=25000#Sender mail.emailForm=hzy_daybreak_lc@foxmail.com#Sender mai
What is the static method of php
Oct 31, 2022 am 09:40 AM
The "static" in php static static methods means that these properties and methods can be called directly without instantiating the class; static is a keyword used to modify the properties and methods of the class, and its usage syntax is such as "class Foo {public static $my_static = 'hello';}".
