如何返回使用PHP

Question

我想用PHP代碼來獲得在字符串中的特殊字符在字符串中找到特殊字符，這是我的審判代碼：

$page_num =">256"; 
if(preg_match('^[-<>]+$', $page_num)) 
{ 
     //Here it should returns special chars present in string.. 
} 

Answer 1

檢查這個

$page_num =">256"; 
if(preg_match_all('/\W/', $page_num,$matches)) 
{ 
     print_r($matches); 
} 

Answer 2

你錯過了什麼是ending delimiter

$page_num =">256"; 
if(preg_match('^[-<>]+$^', $page_num)) 
         ^// this one 
{ 
    //Here it should returns special chars present in string.. 
} 

演示你的代碼，here

，或者你可以試試這個，

$string = 'your string here'; 

if (preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $string)) 
{ 
    echo "yes"; 
} else { 
    echo "no"; 
} 

還有一個解決辦法是

preg_match('![^a-z0-9]!i', $string);