搜索並用數組替換字符串中的單詞

Question

我想掃描一個段落並用另一個單詞替換其中的針頭。例如

$needles = array('head', 'limbs', 'trunk'); 
$to_replace = "this"; 
$haystack = "Main parts of human body is head, Limbs and Trunk"; 

最後出來放需要

Main part of human body is this, this and this 

我該怎麼辦呢？

Answer 1

用的preg_replace：

$needles = array('head', 'limbs', 'trunk'); 
$pattern = '/' . implode('|', $needles) . '/i'; 
$to_replace = "this"; 
$haystack = "Main parts of human body is head, Limbs and Trunk"; 

echo preg_replace($pattern, $to_replace, $haystack); 

Answer 2

假設你正在使用PHP，你可以試試str_ireplace。

$needles = array('head', 'limbs', 'trunk'); 
$to_replace = "this"; 
$haystack = "Main parts of human body is head, Limbs and Trunk"; 
echo str_ireplace($needles, $to_replace, $haystack); // prints "Main parts of human body is this, this and this"