如何从字符串的开头和结尾修剪<br>，空格和

Question

I'm trying to combine trimming of <br> or <br />, whitespaces and  's from the start and end of a string.

There are a few similar questions (here and here), but I couldn't get all 3 working in PHP.

Currently I have this; #(^( |\s)+|( |\s)+$)# needing combining with this: /(^)?(<br\s*\/?>\s*)+$/ but have no idea how to accomplish it. I'm using a PHP preg_replace.

Any help would be great, thanks.

Answer 1

Try this code.

<?php

$test_cases = array(
    "<br>&nbsp; spaces and br at the beginning&nbsp;",
    "<br /> spaces and br with / at the beginning &nbsp;",
    "<br> <br /> more examples &nbsp;",
    "&nbsp; even more tests <br />",
    "<br/> moaaaar <br> &nbsp;",
    "&nbsp;<br> it will not remove the <br> inside the text <br />&nbsp;"
);

$array = preg_replace('#^(<br\s*/?>|\s|&nbsp;)*(.+?)(<br\s*/?>|\s|&nbsp;)*$#i', '$2', $test_cases);

foreach($array as $item) {
    echo htmlspecialchars($item) . "<br>";
}

?>

Test cases are pretty much self explanatory.

edit:

I was having issues with the previous function when using large complex strings. Also I just wanted the end of the string trimmed this worked for me

preg_replace('#(<br\s*/?>)$#i', '', $string);