preg替換url中的第二個子字符串發生

Question

我需要從url中刪除第二個子字符串。所以，我的網址是這樣的：

http://example.com/<category>/<category>-<subcategory>-<id> 

例如，

http://example.com/laptop/laptop-hp-probook-101 must be http://example.com/laptop/hp-probook-101 

或

http://example.com/computer-parts/computer-parts-cool-motherboard-123 must be http://example.com/computer-parts/cool-motherboard-123 

我嘗試這樣做：

$new_url = preg_replace("$category", "", absoluteurl(<url>), 1); 

，但它不能...

Answer 1

您可以使用反向引用：

<?php 
$str = 'http://example.com/laptop/laptop-hp-probook-101'; 
//must be http://example.com/laptop/hp-probook-101 
$str = preg_replace('/\/(.*?)\/\1-/', '/$1/', $str); 
print $str; 

輸出：

http://example.com/laptop/hp-probook-101

Answer 2

試試這個

<?php 

$text = 'This is a test'; 

echo substr_count($text, 'is'); // 2 

Answer 3

$url='https://www.yourdomain.com/laptops/laptops-hp-laptop-laptopid'; 
$arr1=explode("://",$url); 
$arr2=explode("/",$arr1[1]); 
$arr2[2]=str_replace ($arr2[1]."-" , "" , $arr2[2]); 
$s2=implode("/",$arr2); 
$newurl=$arr1[0]."://".$s2; 
echo $newurl; 

你可以嘗試這裏所有上述的http://writecodeonline.com/php/