3v4l.org

run code in 300+ PHP versions simultaneously
<?php $text = "<tr>\n\nhello</tr>'; $text = preg_replace('~[\s\r\n]+(?=(?:(?!<tr).)*<\/tr>)~is', ' ', $text);
Output for 5.4.0 - 5.4.23
Parse error: syntax error, unexpected end of file in /in/kgL6d on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected $end in /in/kgL6d on line 5
Process exited with code 255.
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179.59 ms | 1395 KiB | 60 Q