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<?php $t = "12345"; if( is_numeric($t ) ) { echo $t . " is an int!"; } else { echo $t . " is not an int!"; }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
12345 is an int!