Summary notes on common PHP syntax_PHP tutorial

PHP common syntax1.PHP gets the string length:

<ol class="dp-xml"><li class="alt"><span><span>$</span><span class="attribute"><font color="#ff0000">length</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">strlen</font></span><span>($str);   </span></span></li></ol>

PHP common syntax 2. PHP determines whether a character is NULL:

<ol class="dp-xml">
<li class="alt"><span><span>if(!$str){     </span></span></li>
<li class=""><span>   echo "false"    </span></li>
<li class="alt"><span>    </span></li>
<li class=""><span>}else {     </span></li>
<li class="alt"><span>   echo "true"    </span></li>
<li class=""><span>    </span></li>
<li class="alt"><span>}    </span></li>
</ol>

PHP common syntax 3. Use of link_to:

<ol class="dp-xml"><li class="alt">
<span><strong><font color="#006699"><span class="tag"><?</SPAN><SPAN class=tag-name>php</SPAN></FONT></STRONG><SPAN> echo link_to($question-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong></span><span>getUser(), <br>'user/show?</span><span class="attribute"><font color="#ff0000">id</font></span><span>='.$question-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>getUserId()) </span><span class="tag"><strong><font color="#006699">?></font></strong></span><span>  </span>
</li></ol>

PHP commonly used Syntax 4. PHP intercepts string:

<ol class="dp-xml">
<li class="alt"><span><span>1.split     </span></span></li>
<li class="">
<span>$</span><span class="attribute"><font color="#ff0000">arr</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array</font></span><span>();     </span>
</li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">arr</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">split</font></span><span>("/",$str);</span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>CODE</SPAN><SPAN class=tag>></span><span class="tag"><</SPAN><SPAN class=tag-name>SPAN</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>class</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>php_000000</FONT></SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong><span>     </span>
</li>
<li class="">
<span></span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>SPAN</SPAN><SPAN class=tag>></span></font></strong><span>     </span>
</li>
<li class="alt">
<span></span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>CODE</SPAN><SPAN class=tag>></span></font></strong><span>    </span>
</li>
</ol>

PHP commonly used Syntax 5. PHP replacement string:

<ol class="dp-xml">
<li class="alt"><span><span>1. str_replace("-" , "/" , $str)     </span></span></li>
<li class=""><span>"-" = 要替换的字符     </span></li>
<li class="alt"><span>"/" = 替换后的字符     </span></li>
<li class=""><span>    </span></li>
<li class="alt"><span>2.按数组方式替换：     </span></li>
<li class="">
<span>$</span><span class="attribute"><font color="#ff0000">arr</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array</font></span><span>("0","1","2","3","4","5","6","7","8","9");     </span>
</li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">repNum2</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">str_replace</font></span><span>($arr,"",$str);  </span>
</li>
</ol>

PHP common syntax 6. PHP gets the array length:

<ol class="dp-xml"><li class="alt"><span><span>$</span><span class="attribute"><font color="#ff0000">i</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">count</font></span><span>($array_name);   </span></span></li></ol>

PHP common syntax 7. PHP gets the current time:

<ol class="dp-xml"><li class="alt"><span><span>$</span><span class="attribute"><font color="#ff0000">current_date</font></span><span> = date("Ymd");   </span></span></li></ol>

The above is what we summarize for you this time Common PHP syntax.

http://www.bkjia.com/PHPjc/446352.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/446352.htmlTechArticlePHP common syntax 1. PHP gets the string length: $ length = strlen ($str); PHP common syntax 2 .PHP determines whether the character is NULL: if(!$str){ echo "false" }else{ echo "true" } PHP common syntax 3.l...