PHP 在字符串中最后一次出现字符后删除字符 [英] PHP remove characters after last occurrence of a character in a string

问题描述

所以测试用例字符串可能是:

So the test case string may be:

http://example.com/?u=ben

或

http://example.com

我试图在最后一次出现/"之后删除所有内容，但前提是它不是http://"的一部分.这可能吗！?

I'm trying to remove everything after the last occurrence of a '/' but only if it's not part of the 'http://'. Is this possible!?

到目前为止我有这个:

$url = substr($url, 0, strpos( $url, '/'));

但不起作用，在第一个/"之后去掉所有内容.

But does not work, strips off everything after first '/'.

推荐答案

您应该使用专为此类工作设计的工具 parse_url

You should use the tool that is designed for this type of job, parse_url

url.php

<?php

$urls = array('http://example.com/foo?u=ben',
                'http://example.com/foo/bar/?u=ben',
                'http://example.com/foo/bar/baz?u=ben',
                'https://foo.example.com/foo/bar/baz?u=ben',
            );


function clean_url($url) {
    $parts = parse_url($url);
    return $parts['scheme'] . '://' . $parts['host'] . $parts['path'];
}

foreach ($urls as $url) {
    echo clean_url($url) . "\n";
}

示例:

·> php url.php                                                                                                 
http://example.com/foo
http://example.com/foo/bar/
http://example.com/foo/bar/baz
https://foo.example.com/foo/bar/baz

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