Question

我需要从url中删除第二次出现的子字符串。所以，我的网址是这样的：

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

e.g。

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

我试过了：

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

但它失败了......

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;

输出：

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

Answer 2

试试这个

<?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;

您可以在此处http://writecodeonline.com/php/

尝试以上所有内容

preg_replace url中的第二个子字符串出现

3 个答案: