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hexadecimal validation
Part of my project I needed hexadecimal validation so I write these function. You guys may need this too enjoy! Suggestion are welcome.
<?php // ------------------------------------------------------------------------ /**
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Hexadecimal validation function
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Useful for validating hexadecimal value
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@access public
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@param string input string.
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@return Boolean /
function is_hex($entry) { $validChar=array('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F');// characters allowed in hex $stringlen=strlen($entry); $entry=strtoupper($entry); // lowercase characters? make uppercase // Now scan string for illegal characters for ($i=0;$i<$stringlen;$i++){ if(!in_array(charAt($entry,$i),$validChar)){
return false;} } // end scanning loop return true; } /* -
Javascript simalr charAt function
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Pick the string from the define position
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@access public
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@param string input string.
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@return 1 Character */
function charAt($str, $pos) { return (substr($str, $pos, 1)); } ?>