Coding logic

[PuppetMaster]

Hello guys,

I'm stuck on a simple problem, and can't figure out what I'm doing wrong, so I ask a little help of you all:

the code is as follows:

<?php
   function IsNum( $str ) {
      for( $i = 0; $i < strlen( $str ); $i++ ) {
         $tempChar = $str[$i];
         if( ord( $tempChar ) < ord( "0" ) && ord( $tempChar ) > ord( "9" ) ) { 
            echo( ord( $tempChar ) . " < " . ord( "0" ) . " && " . ord( $tempChar ) . " > " . ord( "9" ) );
            echo( " => " . $tempChar . " FALSE <br>" );
         } else {       

            echo( ord( $tempChar ) . " < " . ord( "0" ) . " && " . ord( $tempChar ) . " > " . ord( "9" ) );
            echo( " => " . $tempChar . " TRUE <br>" );
         }              

      }         

   }    

   IsNum( "ie" );
   IsNum( "19216801" );
?>

Why 'o why doesn't it work? Why doesn't the logic test fail?

• thank you -

[planetsim]

You may want to use is_numeric() before checking.. Also only getting a single character each character is converted to its ASCII code.