TP5 database operations-PHP Tutorial-php.cn

TP5 database operations

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Release： 2023-03-18 18:54:02

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Operation database is the basis for project operation, and TP5 provides us with very convenient operation methods. This article shares how TP5 operates the database and explains it through examples. I hope it will be helpful to everyone.

setField updates the value of a field

    $User = M("User"); // 实例化User对象
    // 更改用户的name值
    $User-> where(&#39;id=5&#39;)->setField(&#39;name&#39;,&#39;ThinkPHP&#39;);

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2 The setField method supports updating multiple fields at the same time. You only need to pass in an array, for example:

      $User = M("User"); // 实例化User对象
    // 更改用户的name和email的值
    $data = array(&#39;name&#39;=>&#39;ThinkPHP&#39;,&#39;email&#39;=>&#39;ThinkPHP@gmail.com&#39;);
    $User-> where(&#39;id=5&#39;)->setField($data);

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For the update of statistical fields (usually numeric types), the system also provides setInc and setDec methods.

    $User = M("User"); // 实例化User对象
    $User->where(&#39;id=5&#39;)->setInc(&#39;score&#39;,3); // 用户的积分加3
    $User->where(&#39;id=5&#39;)->setInc(&#39;score&#39;); // 用户的积分加1
    $User->where(&#39;id=5&#39;)->setDec(&#39;score&#39;,5); // 用户的积分减5
    $User->where(&#39;id=5&#39;)->setDec(&#39;score&#39;); // 用户的积分减1

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Update the data in the data table

    Db::table(&#39;think_user&#39;)->where(&#39;id&#39;, 1)->update([&#39;name&#39; => &#39;thinkphp&#39;]);

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If the data contains the primary key, you can use it directly:

    Db::table(&#39;think_user&#39;)->update([&#39;name&#39; => &#39;thinkphp&#39;,&#39;id&#39;=>1]);

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The update method returns the number of affected data, without modifying any data Return 0

If the data to be updated requires the use of SQL functions or other fields, you can use the following method:

    Db::table(&#39;think_user&#39;)
        ->where(&#39;id&#39;, 1)
        ->update([
            &#39;login_time&#39;  => [&#39;exp&#39;,&#39;now()&#39;],
            &#39;login_times&#39; => [&#39;exp&#39;,&#39;login_times+1&#39;],
        ]);

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Update the value of a field:

    Db::table(&#39;think_user&#39;)->where(&#39;id&#39;,1)->setField(&#39;name&#39;, &#39;thinkphp&#39;);

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setField method Returns the number of affected data. If no data field is modified, returns 0

Increments or decrements the value of a field

    setInc/setDec 如不加第二个参数，默认值为1
    // score 字段加 1
    Db::table(&#39;think_user&#39;)->where(&#39;id&#39;, 1)->setInc(&#39;score&#39;);
    // score 字段加 5
    Db::table(&#39;think_user&#39;)->where(&#39;id&#39;, 1)->setInc(&#39;score&#39;, 5);
    // score 字段减 1
    Db::table(&#39;think_user&#39;)->where(&#39;id&#39;, 1)->setDec(&#39;score&#39;);
    // score 字段减 5
    Db::table(&#39;think_user&#39;)->where(&#39;id&#39;, 1)->setDec(&#39;score&#39;, 5);

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Delayed update

setInc/setDec supports delay Update, if you need to delay the update, pass in the third parameter

In the following example, delay 10 seconds and add 1 to the score field

    Db::table(&#39;think_user&#39;)->where(&#39;id&#39;, 1)->setInc(&#39;score&#39;, 1, 10);

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The setInc/setDec method returns the number of affected data

Assistant function

    // 更新数据表中的数据
    db(&#39;user&#39;)->where(&#39;id&#39;,1)->update([&#39;name&#39; => &#39;thinkphp&#39;]);
    // 更新某个字段的值
    db(&#39;user&#39;)->where(&#39;id&#39;,1)->setField(&#39;name&#39;,&#39;thinkphp&#39;);
    // 自增 score 字段
    db(&#39;user&#39;)->where(&#39;id&#39;, 1)->setInc(&#39;score&#39;);
    // 自减 score 字段
    db(&#39;user&#39;)->where(&#39;id&#39;, 1)->setDec(&#39;score&#39;);

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Quick update (V5.0.5+)

The data, inc, dec and exp methods encapsulated in V5.0.5+ and above are chain operation methods , can be used in conjunction with update.

The following is an example to illustrate usage:

    Db::table(&#39;data&#39;)
        ->where(&#39;id&#39;,1)
        ->inc(&#39;read&#39;)
        ->dec(&#39;score&#39;,3)
        ->exp(&#39;name&#39;,&#39;UPPER(name)&#39;)
        ->update();

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