使用正则表达式删除标签之间的文本

Question

How to remove text between br tags , using regexp

<br />var j=; var g=; g+=G;j+=30006;g+=a;g+=u;g+=l;g+=t;<br />

"var" and ";" is always exist, but other words and symbols may vary, something like this:

<br />var e=; var x=; x+=tos;x+=ах,;<br />

etc...

these lines appear in random order:

<br />Lorem ipsum dolor sit amet, consectetur adipiscing elit.<br />var j=; var g=; g+=G;j+=30006;g+=a;g+=u;g+=l;g+=t;<br /> Donec condimentum neque quis magna consectetur ut aliquam quam dictum. Fusce sed elit purus, lobortis tincidunt libero.<br />Nunc ultrices augue non augue tristique in aliquet urna adipiscing.<br /><br />var ... ;<br />

thanks!

Answer 1

The regexp you want would be

<br\s\/?>.*?var.*?;.*?<br\s\/?>

and just replace the output by <br /><br /> .

Answer 2

If all you want is the output <br /><br /> , you don't need regular expressions:

$result = "<br /><br />";

It's just a constant!

Answer 3

如果<br />元素的数量变化，则可以使用substr_count()来计数<br />元素，然后分别输出相同的数量。

Answer 4

If you have to do it for a whole text and by pairs of <br/> you can do something like that :

$str = 'test0 <br />var j=; var g=; g+=G;j+=30006;g+=a;g+=u;g+=l;g+=t;<br /> test1 <br /> test2';
$result = preg_replace('`<br */>.*?<br */>`s','<br/><br/>',$str);
var_dump($result);