简体中文(ZH-CN) English(EN) 繁体中文(ZH-TW) 日本語(JA) 한국어(KO) Melayu(MS) Français(FR) Deutsch(DE)
Home > Backend Development > PHP Tutorial > body text

Summary notes on common PHP syntax_PHP tutorial

WBOY
Release： 2016-07-15 13:29:40
Original
731 people have browsed it

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>
Copy after login

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>
Copy after login

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>
Copy after login

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>
Copy after login

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>
Copy after login

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>
Copy after login

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>
Copy after login

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


www.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...
Related labels：
length php strlen string Commonly used Summarize of notes get grammar length
source：php.cn
Previous article：Create and modify PDF documents using PHP_PHP Tutorial Next article：Specific code sharing for PHP array implementation of singly linked list_PHP Tutorial
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
Latest Articles by Author
Latest Issues
PHP arrays obtained from URL parameters do not behave as expected I have a URL parameter that contains the category ID and I want to treat it as an array li...
From 2024-04-06 22:09:02
0
1
1428
Where should I place CustomLog directive in apache I'm using php:7.2-apachedocker. I need to disable health check url login access log. Based...
From 2024-04-06 22:03:59
0
1
990
What is the format of the variables in the return value? I am a new learner of php. I found a piece of code: if($x<time()){return[false,'error']...
From 2024-04-06 21:55:20
0
1
778
Problems encountered when using opentbs to generate odt files: values ​​of the same key are displayed in the same row instead of separate columns. I'm using a library called OpenTbs to create odt using PHP, I'm using it because columns a...
From 2024-04-06 20:18:18
0
1
483
Group MySQL results by ID for looping over I have a table with flight data in mysql. I'm writing a php code that will group and displ...
From 2024-04-06 17:27:56
0
1
406
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn：Public welfare online PHP training，Help PHP learners grow quickly！