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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('^( | )+', '', $str); $str = mb_ereg_replace('( | )+$', '', $str); echo mb_ereg_replace(' ', "\n ", $str); ?>
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