3v4l.org

run code in 300+ PHP versions simultaneously
<?php ob_start(); $time = microtime(1); $i = 0; while($i++ < 100000) echo'this','is','just','a','test',',','only and only a test','...','cycled many many times'; ob_end_clean(); echo (microtime(1)-$time)*1000." milliseconds for commas"; echo "\n"; ob_start(); $time = microtime(1); $i = 0; while($i++ < 100000) echo'this'.'is'.'just'.'a'.'test'.','.'only and only a test'.'...'.'cycled many many times'; ob_end_clean(); echo (microtime(1)-$time)*1000." milliseconds for dots";
Output for 5.4.0 - 5.4.8
Parse error: syntax error, unexpected '" milliseconds for commas"' (T_CONSTANT_ENCAPSED_STRING), expecting ',' or ';' in UkLRq on line 8
Process exited with code 255.
Output for 5.3.0 - 5.3.18
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING, expecting ',' or ';' in UkLRq on line 8
Process exited with code 255.
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