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@ 2015-09-04T13:14:39Z

<?php

$var = "r3";
var_dump(is_numeric($var));
var_dump($var+0);

if ( strval($var) != strval(intval($var)) ) {
  echo "Your variable is not an integer";
}

?>

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
is_numeric: documentation ( source)

preferences:dark modelive preview

116.51 ms | 402 KiB | 5 Q