使用PHP删除字符串开头的所有特殊字符 [英] remove all the special character In start of a string using PHP

问题描述

如何使用 PHP 删除字符串开头(首字母应为字母数字)中的所有特殊字符?请

How to remove all the special character In start(First Letter Should Be Alphanumeric) of a string using PHP ? Please

$String = "+&,Hello+{+ +$world";

$String = "+&,Hello+{+ +$world";

删除字符串开头的所有特殊字符后

After remove all special character in start of a string

字符串应该变成Hello+{+ +$world"

The string should become "Hello+{+ +$world"

帮帮我.

推荐答案

这将替换开头的所有非字母数字:

This will replace everything in the beginning which is not alphanumeric:

preg_replace('/^([^a-zA-Z0-9])*/', '', $string);

更新:

如果您需要修剪字符串开头和结尾的非字母数字字符，请使用:

If you need to trim non-alphanumeric characters both in the start and in the end of a string use this:

<?php

$string = "++&5Hello ++f s world6f++&ht6__)  ";

echo preg_replace('/(^([^a-zA-Z0-9])*|([^a-zA-Z0-9])*$)/', '', $string);

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