PHP Classes

File: WebSafeColors.inc.php

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File: WebSafeColors.inc.php
Role: Class source
Content type: text/plain
Description: This class gives complete information about 'Web Safe Colors'
Class: WebSafeColors.inc.php
Lookup and retrieve colors of the Web Safe palette
Author: By
Last change: Optimized the class and added a new function to return the closest webSafeColor name. (as Suggested by Phil)
Date: 17 years ago
Size: 19,737 bytes
 

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<?php /** * This class gives complete information about 'Web Safe Colors' * * It can checks if a color if web safe or not. * It can also return any of RGB, Hexadecimal or name of the web safe color.... * ... by entring any one of above mentioned three parameters. Pretty neat eh ? :) * * * * @author Rochak Chauhan * */ class WebSafeColors { // initialize the database of 140 web safe colors private $isExactMatch = -1; private $webSafeColorDatabase = Array( 0=>Array('colorName'=>'aliceblue', 'hexValue'=>'#F0F8FF'), 1=>Array('colorName'=>'darkslategray', 'hexValue'=>'#2F4F4F'), 2=>Array('colorName'=>'lightsalmon', 'hexValue'=>'#FFA07A'), 3=>Array('colorName'=>'palevioletred', 'hexValue'=>'#DB7093'), 4=>Array('colorName'=>'antiquewhite', 'hexValue'=>'#FAEBD7'), 5=>Array('colorName'=>'darkturquoise', 'hexValue'=>'#00CED1'), 6=>Array('colorName'=>'lightseagreen', 'hexValue'=>'#20B2AA'), 7=>Array('colorName'=>'papayawhip', 'hexValue'=>'#FFEFD5'), 8=>Array('colorName'=>'aqua', 'hexValue'=>'#00FFFF'), 9=>Array('colorName'=>'darkviolet', 'hexValue'=>'#9400D3'), 10=>Array('colorName'=>'lightskyblue', 'hexValue'=>'#87CEFA'), 11=>Array('colorName'=>'peachpuff', 'hexValue'=>'#FFDAB9'), 12=>Array('colorName'=>'aquamarine', 'hexValue'=>'#7FFFD4'), 13=>Array('colorName'=>'deeppink', 'hexValue'=>'#FF1493'), 14=>Array('colorName'=>'lightslategray', 'hexValue'=>'#778899'), 15=>Array('colorName'=>'peru', 'hexValue'=>'#CD853F'), 16=>Array('colorName'=>'azure', 'hexValue'=>'#F0FFFF'), 17=>Array('colorName'=>'deepskyblue', 'hexValue'=>'#00BFFF'), 18=>Array('colorName'=>'lightsteelblue', 'hexValue'=>'#B0C4DE'), 19=>Array('colorName'=>'pink', 'hexValue'=>'#FFC0CB'), 20=>Array('colorName'=>'beige', 'hexValue'=>'#F5F5DC'), 21=>Array('colorName'=>'dimgray', 'hexValue'=>'#696969'), 22=>Array('colorName'=>'lightyellow', 'hexValue'=>'#FFFFE0'), 23=>Array('colorName'=>'plum', 'hexValue'=>'#DDA0DD'), 24=>Array('colorName'=>'bisque', 'hexValue'=>'#FFE4C4'), 25=>Array('colorName'=>'dodgerblue', 'hexValue'=>'#1E90FF'), 26=>Array('colorName'=>'lime', 'hexValue'=>'#00FF00'), 27=>Array('colorName'=>'powderblue', 'hexValue'=>'#B0E0E6'), 28=>Array('colorName'=>'black', 'hexValue'=>'#000000'), 29=>Array('colorName'=>'firebrick', 'hexValue'=>'#B22222'), 30=>Array('colorName'=>'limegreen', 'hexValue'=>'#32CD32'), 31=>Array('colorName'=>'purple', 'hexValue'=>'#800080'), 32=>Array('colorName'=>'blanchedalmond', 'hexValue'=>'#FFEBCD'), 33=>Array('colorName'=>'floralwhite', 'hexValue'=>'#FFFAF0'), 34=>Array('colorName'=>'linen', 'hexValue'=>'#FAF0E6'), 35=>Array('colorName'=>'red', 'hexValue'=>'#FF0000'), 36=>Array('colorName'=>'blue', 'hexValue'=>'#0000FF'), 37=>Array('colorName'=>'forestgreen', 'hexValue'=>'#228B22'), 38=>Array('colorName'=>'magenta', 'hexValue'=>'#FF00FF'), 39=>Array('colorName'=>'rosybrown', 'hexValue'=>'#BC8F8F'), 40=>Array('colorName'=>'blueviolet', 'hexValue'=>'#8A2BE2'), 41=>Array('colorName'=>'fuchsia', 'hexValue'=>'#FF00FF'), 42=>Array('colorName'=>'maroon', 'hexValue'=>'#800000'), 43=>Array('colorName'=>'royalblue', 'hexValue'=>'#4169E1'), 44=>Array('colorName'=>'brown', 'hexValue'=>'#A52A2A'), 45=>Array('colorName'=>'gainsboro', 'hexValue'=>'#DCDCDC'), 46=>Array('colorName'=>'mediumaquamarine', 'hexValue'=>'#66CDAA'), 47=>Array('colorName'=>'saddlebrown', 'hexValue'=>'#8B4513'), 48=>Array('colorName'=>'burlywood', 'hexValue'=>'#DEB887'), 49=>Array('colorName'=>'ghostwhite', 'hexValue'=>'#F8F8FF'), 50=>Array('colorName'=>'mediumblue', 'hexValue'=>'#0000CD'), 51=>Array('colorName'=>'salmon', 'hexValue'=>'#FA8072'), 52=>Array('colorName'=>'cadetblue', 'hexValue'=>'#5F9EA0'), 53=>Array('colorName'=>'gold', 'hexValue'=>'#FFD700'), 54=>Array('colorName'=>'mediumorchid', 'hexValue'=>'#BA55D3'), 55=>Array('colorName'=>'sandybrown', 'hexValue'=>'#F4A460'), 56=>Array('colorName'=>'chartreuse', 'hexValue'=>'#7FFF00'), 57=>Array('colorName'=>'goldenrod', 'hexValue'=>'#DAA520'), 58=>Array('colorName'=>'mediumpurple', 'hexValue'=>'#9370DB'), 59=>Array('colorName'=>'seagreen', 'hexValue'=>'#2E8B57'), 60=>Array('colorName'=>'chocolate', 'hexValue'=>'#D2691E'), 61=>Array('colorName'=>'gray', 'hexValue'=>'#808080'), 62=>Array('colorName'=>'mediumseagreen', 'hexValue'=>'#3CB371'), 63=>Array('colorName'=>'seashell', 'hexValue'=>'#FFF5EE'), 64=>Array('colorName'=>'coral', 'hexValue'=>'#FF7F50'), 65=>Array('colorName'=>'green', 'hexValue'=>'#008000'), 66=>Array('colorName'=>'mediumslateblue', 'hexValue'=>'#7B68EE'), 67=>Array('colorName'=>'sienna', 'hexValue'=>'#A0522D'), 68=>Array('colorName'=>'cornflowerblue', 'hexValue'=>'#6495ED'), 69=>Array('colorName'=>'greenyellow', 'hexValue'=>'#ADFF2F'), 70=>Array('colorName'=>'mediumspringgreen', 'hexValue'=>'#00FA9A'), 71=>Array('colorName'=>'silver', 'hexValue'=>'#C0C0C0'), 72=>Array('colorName'=>'cornsilk', 'hexValue'=>'#FFF8DC'), 73=>Array('colorName'=>'honeydew', 'hexValue'=>'#F0FFF0'), 74=>Array('colorName'=>'mediumturquoise', 'hexValue'=>'#48D1CC'), 75=>Array('colorName'=>'skyblue', 'hexValue'=>'#87CEEB'), 76=>Array('colorName'=>'crimson', 'hexValue'=>'#DC143C'), 77=>Array('colorName'=>'hotpink', 'hexValue'=>'#FF69B4'), 78=>Array('colorName'=>'mediumvioletred', 'hexValue'=>'#C71585'), 79=>Array('colorName'=>'slateblue', 'hexValue'=>'#6A5ACD'), 80=>Array('colorName'=>'cyan', 'hexValue'=>'#00FFFF'), 81=>Array('colorName'=>'indianred', 'hexValue'=>'#CD5C5C'), 82=>Array('colorName'=>'midnightblue', 'hexValue'=>'#191970'), 83=>Array('colorName'=>'slategray', 'hexValue'=>'#708090'), 84=>Array('colorName'=>'darkblue', 'hexValue'=>'#00008B'), 85=>Array('colorName'=>'indigo', 'hexValue'=>'#4B0082'), 86=>Array('colorName'=>'mintcream', 'hexValue'=>'#F5FFFA'), 87=>Array('colorName'=>'snow', 'hexValue'=>'#FFFAFA'), 88=>Array('colorName'=>'darkcyan', 'hexValue'=>'#008B8B'), 89=>Array('colorName'=>'ivory', 'hexValue'=>'#FFFFF0'), 90=>Array('colorName'=>'mistyrose', 'hexValue'=>'#FFE4E1'), 91=>Array('colorName'=>'springgreen', 'hexValue'=>'#00FF7F'), 92=>Array('colorName'=>'darkgoldenrod', 'hexValue'=>'#B8860B'), 93=>Array('colorName'=>'khaki', 'hexValue'=>'#F0E68C'), 94=>Array('colorName'=>'moccasin', 'hexValue'=>'#FFE4B5'), 95=>Array('colorName'=>'steelblue', 'hexValue'=>'#4682B4'), 96=>Array('colorName'=>'darkgray', 'hexValue'=>'#A9A9A9'), 97=>Array('colorName'=>'lavender', 'hexValue'=>'#E6E6FA'), 98=>Array('colorName'=>'navajowhite', 'hexValue'=>'#FFDEAD'), 99=>Array('colorName'=>'tan', 'hexValue'=>'#D2B48C'), 100=>Array('colorName'=>'darkgreen', 'hexValue'=>'#006400'), 101=>Array('colorName'=>'lavenderblush', 'hexValue'=>'#FFF0F5'), 102=>Array('colorName'=>'navy', 'hexValue'=>'#000080'), 103=>Array('colorName'=>'teal', 'hexValue'=>'#008080'), 104=>Array('colorName'=>'darkkhaki', 'hexValue'=>'#BDB76B'), 105=>Array('colorName'=>'lawngreen', 'hexValue'=>'#7CFC00'), 106=>Array('colorName'=>'oldlace', 'hexValue'=>'#FDF5E6'), 107=>Array('colorName'=>'thistle', 'hexValue'=>'#D8BFD8'), 108=>Array('colorName'=>'darkmagenta', 'hexValue'=>'#8B008B'), 109=>Array('colorName'=>'lemonchiffon', 'hexValue'=>'#FFFACD'), 110=>Array('colorName'=>'olive', 'hexValue'=>'#808000'), 111=>Array('colorName'=>'tomato', 'hexValue'=>'#FD6347'), 112=>Array('colorName'=>'darkolivegreen', 'hexValue'=>'#556B2F'), 113=>Array('colorName'=>'lightblue', 'hexValue'=>'#ADD8E6'), 114=>Array('colorName'=>'olivedrab', 'hexValue'=>'#6B8E23'), 115=>Array('colorName'=>'turquoise', 'hexValue'=>'#40E0D0'), 116=>Array('colorName'=>'darkorange', 'hexValue'=>'#FF8C00'), 117=>Array('colorName'=>'lightcoral', 'hexValue'=>'#F08080'), 118=>Array('colorName'=>'orange', 'hexValue'=>'#FFA500'), 119=>Array('colorName'=>'violet', 'hexValue'=>'#EE82EE'), 120=>Array('colorName'=>'darkorchid', 'hexValue'=>'#9932CC'), 121=>Array('colorName'=>'lightcyan', 'hexValue'=>'#E0FFFF'), 122=>Array('colorName'=>'orangered', 'hexValue'=>'#FF4500'), 123=>Array('colorName'=>'wheat', 'hexValue'=>'#F5DEB3'), 124=>Array('colorName'=>'darkred', 'hexValue'=>'#8B0000'), 125=>Array('colorName'=>'lightgoldenrodyellow', 'hexValue'=>'#FAFAD2'), 126=>Array('colorName'=>'orchid', 'hexValue'=>'#DA70D6'), 127=>Array('colorName'=>'white', 'hexValue'=>'#FFFFFF'), 128=>Array('colorName'=>'darksalmon', 'hexValue'=>'#E9967A'), 129=>Array('colorName'=>'lightgreen', 'hexValue'=>'#90EE90'), 130=>Array('colorName'=>'palegoldenrod', 'hexValue'=>'#EEE8AA'), 131=>Array('colorName'=>'whitesmoke', 'hexValue'=>'#F5F5F5'), 132=>Array('colorName'=>'darkseagreen', 'hexValue'=>'#8FBC8F'), 133=>Array('colorName'=>'lightgrey', 'hexValue'=>'#D3D3D3'), 134=>Array('colorName'=>'palegreen', 'hexValue'=>'#98FB98'), 135=>Array('colorName'=>'yellow', 'hexValue'=>'#FFFF00'), 136=>Array('colorName'=>'darkslateblue', 'hexValue'=>'#483D8B'), 137=>Array('colorName'=>'lightpink', 'hexValue'=>'#FFB6C1'), 138=>Array('colorName'=>'paleturquoise', 'hexValue'=>'#AFEEEE'), 139=>Array('colorName'=>'yellowgreen', 'hexValue'=>'#9ACD32'), ); /** * Function to get RGB value form its hex code * * * @param $hexValue string - format #ff0067 * @return string - rgb value */ public function getRgbValuefromHex($hexValue) { if($hexValue[0] == '#' && strlen(trim($hexValue))==7) { $r = $hexValue[1].$hexValue[2]; $g = $hexValue[3].$hexValue[4]; $b = $hexValue[5].$hexValue[6]; return hexdec($r).",".hexdec($g).",".hexdec($b); } else { echo "<b><font face='verdana' color='red' size='2'> ERROR: Invalid color Information. </font></b>"; return false; } } /** * Function to display the complete information of web safe colors * * @return array */ public function displayColorDatabase() { echo "<table width='80%' align='center' cellpadding='2' cellspacing='0' border=0' ><tr style='background-color:blanchedalmond'> "; echo "<td><b><font face='verdana' color='brown' size='2'> S No. </font></b></td> <td><b><font face='verdana' color='black' size='2'> 'Color Name' </font></b></td> <td><b><font face='verdana' color='green' size='2'> 'Hex Value' </font></b></td> <td><b><font face='verdana' color='red' size='2'> 'RGB Value' </font></b></td> <td><b><font face='verdana' color='blue' size='2'> 'COLOR' </font></b></td></tr> <tr><td colspan='5'><BR></td></tr>"; for($i=0; $i<count($this->webSafeColorDatabase); $i++) { if($i%2 == 0) { $bgColor ='lavender'; } else { $bgColor ='#FFFFFF'; } echo "<tr style='background-color:$bgColor'> <td><b><font face='verdana' color='brown' size='2'>". ($i+1) ."</font></b></td> <td><b><font face='verdana' color='black' size='2'>". $this->webSafeColorDatabase[$i]['colorName'] ."</font></b></td> <td><b><font face='verdana' color='green' size='2'>". $this->webSafeColorDatabase[$i]['hexValue'] ."</font></b></td> <td><b><font face='verdana' color='red' size='2'>". $this->getRgbValuefromHex($this->webSafeColorDatabase[$i]['hexValue']) ."</font></b></td> <td align='center' style='background-color:".$this->webSafeColorDatabase[$i]['colorName']."'></td> </tr>"; } echo "</tr></table>"; } /** * Function to return the name of the web safe color * * @param $colorInfo string - could be the value of color in hexadecimal or in rgb * usage getColorName('#FF0033') * OR * usage getColorName('255,23,56') * @return string - name of the web safe color (if present in the above $webSafeColorDatabase) , false otherwise */ public function getColorName($colorInfo) { // input check if( trim($colorInfo[0]) != '#' && substr_count($colorInfo, ",") != 2 ) { echo "<b><font face='verdana' color='red' size='2'> ERROR: Invalid color Information. </font></b>"; return false; } else{ if(trim($colorInfo[0]) == '#' && strlen(trim($colorInfo)) == 7) { // the input color is in hexadecimal for($i=0; $i<count($this->webSafeColorDatabase); $i++) { if( strtolower(trim($this->webSafeColorDatabase[$i]['hexValue']))== strtolower(trim($colorInfo)) ) { return $this->webSafeColorDatabase[$i]['colorName']; } } } else { // the input color is in RGB for($i=0; $i<count($this->webSafeColorDatabase); $i++) { if( strtolower(trim($this->getRgbValuefromHex($this->webSafeColorDatabase[$i]['hexValue']))) == trim($colorInfo) ) { return $this->webSafeColorDatabase[$i]['colorName']; } } } } return false; } /** * Function to return the hexadecimal value of the web safe color * * @param $colorInfo string - could be the value of color in rgb or name of the color (no spaces between the name) * usage getHexValue('aliceblue') * OR * usage getHexValue('255,23,56') * @return string - Hexadecimal value of the web safe color (if present in the above $webSafeColorDatabase) , false otherwise */ public function getHexValue($colorInfo) { if(substr_count($colorInfo, ",") == 2) { // the input color is in rgb for($i=0; $i<count($this->webSafeColorDatabase); $i++) { if( strtolower(trim($this->getRgbValuefromHex($this->webSafeColorDatabase[$i]['hexValue'])))== trim($colorInfo) ) { return $this->webSafeColorDatabase[$i]['hexValue']; } } } else{ // the input is name of the color for($i=0; $i<count($this->webSafeColorDatabase); $i++) { if( strtolower(trim($this->webSafeColorDatabase[$i]['colorName']))== strtolower(trim($colorInfo)) ) { return $this->webSafeColorDatabase[$i]['hexValue']; } } } return false; } /** * Function to return the RGB value of the web safe color * * @param $colorInfo string - could be the value of color in hexadecimal or name of the color (no spaces between the name) * usage getRgbValue('#ff0000') * OR * usage getRgbValue('255,23,56') * @return string - RGB value of the web safe color (if present in the above $webSafeColorDatabase) , false otherwise */ public function getRgbValue($colorInfo) { if(trim($colorInfo[0]) == '#' && strlen(trim($colorInfo))==7) { // the input color is in rgb for($i=0; $i<count($this->webSafeColorDatabase); $i++) { if( strtolower(trim($this->webSafeColorDatabase[$i]['hexValue']))== trim($colorInfo) ) { return $this->getRgbValuefromHex($this->webSafeColorDatabase[$i]['hexValue']); } } } else{ // the input is name of the color for($i=0; $i<count($this->webSafeColorDatabase); $i++) { if( strtolower(trim($this->webSafeColorDatabase[$i]['colorName']))== strtolower(trim($colorInfo)) ) { return $this->getRgbValuefromHex($this->webSafeColorDatabase[$i]['hexValue']); } } } return false; } /** * Function to check if the input color is web safe or not * * @param $colorInfo string - could be the value of color in hexadecimal/RGB or name of the color (no spaces between the name) * usage isWebSafeColor('#ff0000') * OR * usage isWebSafeColor('red') * OR * usage isWebSafeColor('255,23,56') * * @return boolean - true if present in the above $webSafeColorDatabase , false otherwise */ public function isWebSafeColor($colorInfo) { if( trim($colorInfo[0]) == '#' && strlen(trim($colorInfo))==7) { //input color is in hexadecimal format for($i=0; $i<count($this->webSafeColorDatabase); $i++) { if( strtolower(trim($this->webSafeColorDatabase[$i]['hexValue']))== strtolower(trim($colorInfo)) ) { return true; } } } elseif(substr_count($colorInfo, ",") == 2) { //input color is in rgb format for($i=0; $i<count($this->webSafeColorDatabase); $i++) { if( strtolower(trim($this->getRgbValuefromHex($this->webSafeColorDatabase[$i]['hexValue'])))== trim($colorInfo) ) { return true; } } } else { //input is the name of the color for($i=0; $i<count($this->webSafeColorDatabase); $i++) { if( strtolower(trim($this->webSafeColorDatabase[$i]['colorName']))== strtolower(trim($colorInfo)) ) { return true; } } } return false; } /** * Fucntion to return closet color to main function * * @access private * * @param $colorInfo - string * * @return string */ private function returnClosestColor($colorInfo) { if( strlen(trim($colorInfo)) =='') { echo "<b><font face='verdana' color='red' size='2'> ERROR: Invalid color Information. </font></b>"; return false; } // no shortest distance found, yet $temp_lev = 9999; // loop through words to find the closest for($i=0; $i<count($this->webSafeColorDatabase); $i++) { $color = $this->webSafeColorDatabase[$i]['colorName']; // calculate the distance between the input color, // and the current color $lev = levenshtein($colorInfo, $color); // check for an exact match if ($lev == 0) { // closest color is this one (exact match) $closest = $color; $this->isExactMatch = 0; // break out of the loop; we've found an exact match break; } else { if($lev<=$temp_lev) { $temp_lev = $lev; $closest = $color; } } } return $closest; } /** * Function to return closest websafe color * * @param $colorInfo string- only the name of the color * * @return $string */ public function getClosestMatchingWebsafeColor($colorInfo) { if( (strlen(trim($colorInfo))=='') || ( trim($colorInfo[0]) == '#' && strlen(trim($colorInfo)) == 7) || (substr_count($colorInfo, ",") == 2) ) { echo "<b><font face='verdana' color='red' size='2'> ERROR: Invalid color Information. </font></b>"; return false; } else { // color name return $this->returnClosestColor($colorInfo); } return false; } } ?>