只替換php中的部分字符串

Question

我正在調用api並用自己的url替換遠程url。 http://example.com/a/b/icon_name.gif至http://example.org/c/d/icon_name.png。域名被替換以及從.gif到.png的文件擴展名。替換字符串的兩個部分比使用兩個函數更經濟的方法是什麼？

$hourlyUrl = array_map(
    function($str) { 
     return str_replace('example.com/a/b/', 'example.org/c/d/', $str); 
    }, 
$hourlyUrl 
); 

$hourlyUrl = array_map(
    function($str) { 
     return str_replace('.gif', '.png', $str); 
    }, 
$hourlyUrl 
); 

Answer 1

// Provides: You should eat pizza, beer, and ice cream every day 
$phrase = "You should eat fruits, vegetables, and fiber every day."; 
$healthy = array("fruits", "vegetables", "fiber"); 
$yummy = array("pizza", "beer", "ice cream"); 

$newphrase = str_replace($healthy, $yummy, $phrase); 

文檔：
http://php.net/manual/en/function.str-replace.php

你的情況下：

$old_url = "http://example.com/a/b/icon_name.gif"; 
$old = array("example.com/a/b/", ".gif"); 
$new = array("example.org/c/d/", ".png"); 

$new_url = str_replace($old, $new, $old_url); 

// Output: http://example.com/c/d/icon_name.png