使用PHP删除每个字符串开头和结尾的所有特殊字符 - remove all the special character in start and end of each string using PHP

remove all the special character in start and end of each string using PHP

如何使用PHP删除每个字符串的开始和结束的所有特殊字符?告诉我怎么做?

示例代码:

$string ="_$#+Hello(+- $^#World2013@!%=+";

从字符串的开始和结束位置删除所有特殊字符后，字符串将打印如下:

$string ="Hello(+- $^#World2013";

Trim将从字符串的开头和结尾删除字符。

$string ="_$#+Hello(+- $^#World2013@!%=+";
$my_special_characters='_$#@!%=+';
$string=trim($string, $my_special_characters);

你可以用你需要的任何东西更新$my_special_characters变量

$string ="_$#+Hello(+- $^#World2013@!%=+";
$sub_string = preg_replace("/^([^a-zA-Z0-9])*/", "", $string,1);
$sub_string = strrev(preg_replace("/^([^a-zA-Z0-9])*/", "",strrev($sub_string),1));
var_dump($sub_string); // string(21) "Hello(+- $^#World2013"