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run code in 150+ php & hhvm versions
Bugs & Features
<?php function cr($s) { return preg_replace('/\r?\n/', "\r\n", $str); } $s = cr("[\r\n]"); print_r($s);
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: str in /in/rnbQo on line 3
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: str in /in/rnbQo on line 3