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@ 2014-08-14T02:17:19Z

<?php

$str = '';

for ($i=0; $i<256; $i++) {
	$c = chr($i);
	if (json_encode($c) === "\"$c\"") {
		$str .= $c;
	}
}

echo $str;

Output
Performance
VLD
References
Branches

chr: documentation ( source)
json_encode: documentation ( source)

preferences:dark modelive preview

35.71 ms | 402 KiB | 5 Q