PHP preg_split有两个分隔符，只捕获一个

问题描述：

Really poor at regular expressions, sorry in advance!

I've tried my best to work out how to split a string into a array with two delimiters and still capture one and include it in the final array. preg_split seems ideal for this but my regular expression is letting me down.

If for example, I've the string foo = bar AND bar=foo; I want to split the string at either a space, or the = character BUT keep the = so the array would look like:

Array
(
    [0] => foo
    [1] => =
    [2] => bar
    [3] => AND
    [4] => bar
    [5] => =
    [6] => foo
)

Unfortunately, I'm getting this:

Array
(
    [0] => foo
    [1] => 
    [2] => =
    [3] => 
    [4] => bar
    [5] => AND
    [6] => bar
    [7] => =
    [8] => foo
)

I've got here with this code (in PHP):

<!doctype html>
<?php

$string = 'foo = bar AND bar=foo';

$array = preg_split('/ +|(=)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE);

?>
<pre>
<?php

print_r($array);

?>
</pre>

I'd really appreciate any help you guys can give, thanks everyone!

正则表达式真的很差，提前抱歉！ p>

我是我尽力研究如何将一个字符串拆分为一个带有两个分隔符的数组，并仍然捕获一个并将其包含在最终数组中。 preg_split code>似乎是理想的，但我的正则表达式让我失望。 p>

例如，如果我有字符串 foo = bar AND bar = FOO 代码>; 我想将字符串拆分为空格或 = code>字符但保留 = code>，以便数组看起来像： p>

  Array 
（
 [0] =＆gt; foo 
 [1] =＆gt; = 
 [2] =＆gt; bar 
 [3] =＆gt; AND 
 [4] =  ＆gt; bar 
 [5] =＆gt; = 
 [6] =＆gt; foo 
）
  code>  pre> 
 
 不幸的是，我得到了这个： 
 
 
  Array 
（
 [0] =＆gt; foo 
 [1] =＆gt; 
 [2] =＆gt; = 
 [3] =＆gt;  ; 
 [4] =＆gt; bar 
 [5] =＆gt; AND 
 [6] =＆gt; bar 
 [7] =＆gt; = 
 [8] =＆gt; foo 
）\  n  code>  pre> 
 
 我已经使用此代码（在PHP中）： p> 
 
 
 ＆lt;！doctype html＆gt; \  n＆lt;？php 
 
 $ string ='foo = bar AND bar = foo'; 
 
 $ array = preg_split（'/ + |（=）/'，$ string，-1，PREG_SPLIT_DELIM_CAPTURE）; \  ñ
＆GT;吗？
＆LT;预＆GT; 
＆LT; PHP 
 
print_r（$阵列）; 
 
＆GT;吗？
＆LT; /预＆GT; 
 代码>  PRE> 
  
 我非常感谢你们给予的任何帮助，谢谢大家！ p> 
  div>

答

Add the PREG_SPLIT_NO_EMPTY flag:

$string = 'foo = bar AND bar=foo';
$array = preg_split('/ +|(=)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);

Now, this outputs:

Array
(
    [0] => foo
    [1] => =
    [2] => bar
    [3] => AND
    [4] => bar
    [5] => =
    [6] => foo
)

答

Either use PREG_SPLIT_NO_EMPTY to nuke the "empty" matches:

$array = preg_split('/ +|(=)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);

Or, change the regex such that it does not produce empty matches:

$array = preg_split('/ +|(?<!\G)(=)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE);

PHP preg_split有两个分隔符，只捕获一个

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