How to remove leading and trailing spaces in php

How to remove leading and trailing spaces in php: 1. Remove spaces through the "trim", "rtrim" and "ltrim" functions that come with PHP; 2. Replace and remove spaces through regular expressions, the syntax is as follows "mb_ereg_replace('^( | ) ', '', $str);".

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How to remove spaces at the beginning and end of a string in PHP

When I was doing PHP today, I needed to remove the spaces at the beginning and end of the string. Baidu found out that PHP comes with this function trim, which is really much more convenient. I would like to share it with you

The first method: through the function that comes with php

<?php
/*
trim 去除一个字符串两端空格，
rtrim 是去除一个字符串右部空格，
ltrim 是去除一个字符串左部空格。
*/
?>
<?php
echo trim(" 空格 ")."<br>";
echo rtrim(" 空格 ")."<br>";
echo ltrim(" 空格 ")."<br>";
?>

The second method: through regular expression replacement, the function is stronger

php removes the leading and trailing spaces in the string (including Full width)

The code is as follows:

<?
$str="　　　 　脚本之家 www.jb51.net 　　　　";
$str = mb_ereg_replace(&#39;^(　| )+&#39;, &#39;&#39;, $str);
$str = mb_ereg_replace(&#39;(　| )+$&#39;, &#39;&#39;, $str);
echo mb_ereg_replace(&#39;　　&#39;, "\n　　", $str);
?>

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