Code Examples -> Convert a Hex color string to a Decimal string.

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PHP Code Examples

Title :	Convert a Hex color string to a Decimal string.
Categories :	PHP, HTML and PHP	Michael Stearne
Date :	Dec 23rd 1999
Grade :	2 of 5 (graded 1 times)
Viewed :	5473
File :	No file for this code example.
Images :	No Images for this code example.

Search :	More code by Michael Stearne
Action :	Grade This Code Example
Tools :	My Examples List

Code

// This function will convert a Hex color string in the form #AAAAAA the decimal
//Representation of it. It will return an array with three elements, element 0 is the Red color
//in a decimal, element 1 is the Green color in a decimal, element 2 is the Blue color in a decimal
//(Base 10 number)
// Michael Stearne
// Usage:
// $hex="564356";
// if($R=HexColor2Dec($hex))print "$R[0] $R[1] $R[2]";

function HexColor2Dec($HexNumber){
$HexNumber=str_replace("#","",$HexNumber);

if(strlen($HexNumber)!=6){
echo "Please supply Hex numbers in #AAAAAA or AAAAAA format.";
return false;
}
$R=substr($HexNumber,0,2);
$G=substr($HexNumber,2,2);
$B=substr($HexNumber,4,2);
$RDec=(substr($R,0,1)*16)+(substr($R,1,1));
$BDec=(substr($B,0,1)*16)+(substr($B,1,1));
$GDec=(substr($G,0,1)*16)+(substr($G,1,1));
$RGBColor[0]=$RDec;
$RGBColor[1]=$GDec;
$RGBColor[2]=$BDec;
return $RGBColor;
}

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User Comments

Jovaras wrote :480
//this could do more (i mean supporting a,b,c,d,e,f charachters) function sk_raid($sk) { $sk=strtoupper($sk); switch ($sk) { case "A" :$skaicius=10;break; case "B" :$skaicius=11;break; case "C" :$skaicius=12;break; case "D" :$skaicius=13;break; case "E" :$skaicius=14;break; case "F" :$skaicius=15;break; case "0" :$skaicius=0;break; default : if(intval($sk)!=0){$skaicius=$sk;break;} $skaicius=999; } return $skaicius; } function HexColor2Dec($HexNumber){ $HexNumber=str_replace("#","",$HexNumber); if(strlen($HexNumber)!=6){ echo "Please supply Hex numbers in #AAAAAA or AAAAAA format."; return false; } $spalva=substr($HexNumber,0,2); $spalva=sk_raid(substr($spalva,0,1))*16+sk_raid(substr($spalva,1,1)); if ($spalva<=255)$RGBColor[0]=$spalva; else $RGBColor[0]=" Illegal character found"; $spalva=substr($HexNumber,2,4); $spalva=sk_raid(substr($spalva,0,1))*16+sk_raid(substr($spalva,1,1)); if ($spalva<=255)$RGBColor[1]=$spalva; else $RGBColor[1]=" Illegal character found "; $spalva=substr($HexNumber,4,6); $spalva=sk_raid(substr($spalva,0,1))*16+sk_raid(substr($spalva,1,1)); if ($spalva<=255)$RGBColor[2]=$spalva; else $RGBColor[2]=" Illegal character found "; return $RGBColor; }