Php 从字符串/url中删除文本

我有许多URL（字符串）：

如何使用PHP删除此变量的/number/x？ 例如：

    $one = 'http://www.site.com/first/1/two/2/three/3';
    $two = '/first/1/two/2';
    $three = 'site.com/first/1/three/3';
    $four = 'http://www.site.com/first/13/two/2/three/33/four/23';

---

我建议采取以下模式：

'@/number/[0-9]{1,}@i'

原因如下：

<?php

$urls[] = 'http://www.site.com/first/1/two/2/three/3/number/342';
$urls[] = '/first/1/two/2/number/32';
$urls[] = 'site.com/first/1/three/3/number/7';
$urls[] = 'http://www.site.com/first/13/two/2/three/33/number/33/four/23';
$urls[] = '/first/1/Number/55/two/2/number/32';

$actual = array_map(function($url){
  return preg_replace('@/number/[0-9]{1,}@i', '', $url);
}, $urls);

$expected = array(
  'http://www.site.com/first/1/two/2/three/3',
  '/first/1/two/2',
  'site.com/first/1/three/3',
  'http://www.site.com/first/13/two/2/three/33/four/23',
  '/first/1/two/2'
);

assert($expected === $actual); // true

i

修饰符将捕获像“/NumBer/42”这样的URL

使用

@

对模式进行定界有助于形成更具可读性的模式，并减少对斜杠的转义（例如

\/\d+

）

虽然

[0-9]{1，}

比

\d+

更详细，但它还有一个额外的好处，那就是更能揭示意图

下面是它的用法演示：

<?php

$urls[] = 'http://www.site.com/first/1/two/2/three/3/number/342';
$urls[] = '/first/1/two/2/number/32';
$urls[] = 'site.com/first/1/three/3/number/7';
$urls[] = 'http://www.site.com/first/13/two/2/three/33/number/33/four/23';
$urls[] = '/first/1/Number/55/two/2/number/32';

$actual = array_map(function($url){
  return preg_replace('@/number/[0-9]{1,}@i', '', $url);
}, $urls);

$expected = array(
  'http://www.site.com/first/1/two/2/three/3',
  '/first/1/two/2',
  'site.com/first/1/three/3',
  'http://www.site.com/first/13/two/2/three/33/four/23',
  '/first/1/two/2'
);

assert($expected === $actual); // true

<?php

$urls[] = 'http://www.site.com/first/1/two/2/three/3/number/342';
$urls[] = '/first/1/two/2/number/32';
$urls[] = 'site.com/first/1/three/3/number/7';
$urls[] = 'http://www.site.com/first/13/two/2/three/33/number/33/four/23';
$urls[] = '/first/1/Number/55/two/2/number/32';

$actual = array_map(function($url){
  return preg_replace('@/number/[0-9]{1,}@i', '', $url);
}, $urls);

$expected = array(
  'http://www.site.com/first/1/two/2/three/3',
  '/first/1/two/2',
  'site.com/first/1/three/3',
  'http://www.site.com/first/13/two/2/three/33/four/23',
  '/first/1/two/2'
);

assert($expected === $actual); // true