note 37194 added to function.intval

String "+0134.000" is integer valued!!! This function will work (full testing form included) even for such cases: <?php if(!$val) $val="+0134.000"; if(real_is_intValued($val)) echo('"'.$val.'" is INTEGER valued'); else echo('"'.$val.'" is not an integer'); echo('<form action="testint.php"><input name="val" value="'.$val.'"><input type=submit></form>'); function real_is_intValued($var) { if(is_numeric($var)) { // It's numeric valued so it's at least a float $var=(float)$var; return ((float)(int)$var)===$var; } return FALSE; } ?> Functions that convert $var to int and then back to string will FAIL!! Casting "03.0" to int will produce 3 Casting 3 to string will produce "3" But "03.0" is not == "3". Using strtoupper() is also not correct, because it will assume  that ";,.#" is a number. Also things like if($var+1 != 1 || $var == "0") {...} will fail if $var is "0000" [NOTE: this post has been previously removed by someone that left the NOT WORKING functions on instead!! Test the code please...] ---- Manual Page -- http://www.php.net/manual/en/function.intval.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+37194 Delete -- http://master.php.net/manage/user-notes.php?action=delete+37194&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+37194&report=yes Search -- http://master.php.net/manage/user-notes.php