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@ 2014-09-18T03:35:20Z

<?php

$string = "ABCDE  ";

echo trim($string);
echo preg_replace('/\s+/', '', $string);
echo preg_replace('/\s\s+/', '', $string);
echo trim(preg_replace('/[\s\t\n\r\s]+/', '', $string));
echo preg_replace('/~\x{00a0}~siu/', '', $string);

Output
Performance
VLD
References
Branches

trim: documentation ( source)
preg_replace: documentation ( source)

preferences:dark modelive preview

57.52 ms | 402 KiB | 5 Q