PHP hex2rgb函数代码示例

function grad($c1, $c2, $dir = 'top')
{
    $c1 = trim($c1, '#');
    $c2 = trim($c2, '#');
    $c1b = substr($c1, -6);
    $c2b = substr($c2, -6);
    if (strlen($c1) < 7) {
        $a1 = $a2 = 'FF';
    } else {
        $a1 = substr($c1, 0, 2);
        $a2 = substr($c2, 0, 2);
    }
    $a1b = $a1;
    $a2b = $a2;
    if ($a1 == 'FF') {
        $a1b = 100;
    }
    if ($a2 == 'FF') {
        $a2b = 100;
    }
    $a = hex2rgb($c1b) . ',' . $a1b / 100;
    $b = hex2rgb($c2b) . ',' . $a2b / 100;
    #if($c1=='00e6e6e6')die("</style>startColorstr='#$a1$c1b',endColorstr='#$a2$c2b'");
    return "background:-webkit-gradient(linear,left {$dir},left bottom,from(rgba({$a})),to(rgba({$b})));background:-moz-linear-gradient(rgba({$a}) 0%,rgba({$b}) 100%);background:-ms-linear-gradient({$dir},rgba({$a}) 0%,rgba({$b}) 100%);filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#{$a1}{$c1b}',endColorstr='#{$a2}{$c2b}',GradientType=0);";
}

/**
 * Enqueues styles for front-end.
 */
function ht_theme_styles()
{
    global $wp_styles;
    /*
     * Loads our main stylesheet.
     */
    wp_enqueue_style('theme-style', get_stylesheet_uri());
    /*
     * Loads our Google Font.
     */
    $subsets = 'latin,latin-ext';
    $protocol = is_ssl() ? 'https' : 'http';
    $query_args = array('family' => 'Open+Sans:400,400italic,600,600italic', 'subset' => $subsets);
    wp_enqueue_style('theme-font', esc_url(add_query_arg($query_args, "{$protocol}://fonts.useso.com/css")), array(), null);
    /*
     * Add font awesome CSS
     */
    wp_enqueue_style('font-awesome', get_template_directory_uri() . '/css/font-awesome.min.css', array('theme-style'));
    /*
     * Add Lightbox CSS
     */
    wp_enqueue_style('magnific-popup', get_template_directory_uri() . '/css/magnific-popup.css', array('theme-style'));
    /*
     * Load theme custom colors
     */
    //Theme variables from theme customizer
    $ht_styling_themecolor = get_theme_mod('ht_styling_themecolor', '#EC4B36');
    // Convert theme colors from hex to rgb
    $ht_styling_themecolor_rgb = hex2rgb($ht_styling_themecolor);
    // Add custom styles
    $custom_css = "\r\r\n\ta, a:visited, a:hover, \r\r\n\t.comment-action i {color: {$ht_styling_themecolor};}\r\r\n\tinput[type='submit'], \r\r\n\tinput[type='button'], \r\r\n\t.paging-navigation li a:hover, \r\r\n\t.hentry .entry-header:after, \r\r\n\t.hentry .entry-footer:before, \r\r\n\t.hentry .hentry-box > .entry-quote, \r\r\n\t.hentry .entry-link, \r\r\n\t.hentry .entry-status,\r\r\n\t#site-header #logo,\r\r\n\t.hentry .entry-date,\r\r\n\t.paging-navigation:after,\r\r\n\t#timeline > li .hentry:before {\r\r\n\t\tbackground: {$ht_styling_themecolor};\r\r\n\t}\r\r\n\t.entry-content a:hover, \r\r\n\t.entry-content blockquote, \r\r\n\tp.pullquote-left, \r\r\n\tp.pullquote-right,\r\r\n\t#social-icons li a:hover,\r\r\n\t#nav-primary > ul > li:hover > a {\r\r\n\t\tborder-color: {$ht_styling_themecolor};\r\r\n\t}\r\r\n\t#social-icons li a:hover,\r\r\n\t#nav-primary > ul > li:hover > a,\r\r\n\t#nav-primary ul ul li a:hover {\r\r\n\t\tcolor: {$ht_styling_themecolor};\r\r\n\t}\r\r\n\t.hentry .entry-thumb-caption, .gallery .gallery-item-caption {\r\r\n\tbackground: {$ht_styling_themecolor};\r\r\n\tbackground: rgba({$ht_styling_themecolor_rgb[0]},{$ht_styling_themecolor_rgb[1]},{$ht_styling_themecolor_rgb[2]},0.8);\r\r\n\t}\r\r\n\t";
    wp_add_inline_style('theme-style', $custom_css);
}

function ApplyParameters($input)
{
    global $parameters;
    $textfx = array("", "text-shadow: 1px 1px black;", "text-shadow: -1px -1px black, 0px -1px black, 1px -1px black, 1px 0px black, 1px 1px black, 0px 1px black, -1px 1px black, -1px 0px black;");
    $metafonts = array("serif", "sans-serif", "fantasy", "monospace");
    $lines = explode("\n", str_replace("\r", "", $input));
    $output = "";
    foreach ($lines as $line) {
        foreach ($parameters as $id => $settings) {
            $value = $_POST[$id];
            if ($settings['type'] == "percentage") {
                $value = $_POST[$id] / 100;
            } else {
                if ($settings['type'] == "textfx") {
                    $value = $textfx[$value];
                }
            }
            $line = str_replace("[" . $id . "]", $value, $line);
            if ($settings['type'] == "color") {
                $line = str_replace("[" . $id . "_RGB]", hex2rgb($value), $line);
            }
            if ($settings['type'] == "font") {
                if (in_array($value, $metafonts)) {
                    $line = str_replace("\"", "", $line);
                }
            }
        }
        if (strpos($line, ": ;") === FALSE && strpos($line, ":  !important;") === FALSE && strpos($line, ": px;") === FALSE && strpos($line, ": em;") === FALSE && strpos($line, ": 0px;") === FALSE && strpos($line, ": 0em;") === FALSE && !(strpos($line, "rgba(") !== FALSE && strpos($line, ", 0);") !== FALSE)) {
            $output .= $line . "\n";
        }
    }
    return $output;
}

 /**
  * 输出图片
  * 
  * @param  string $size     [description]
  * @param  string $bgcolor  [description]
  * @param  string $color    [description]
  * @param  string $text     [description]
  * @param  [type] $fontsize [description]
  * @return [type]           [description]
  */
 public function index($size = '100x100', $bgcolor = 'ccc', $color = '555', $text = '', $fontsize = NULL)
 {
     $cache_filepath = storage_path('placeholders/' . md5(serialize(func_get_args())) . '.png');
     if (!file_exists($cache_filepath)) {
         // Dimensions
         list($width, $height) = explode('x', $size);
         empty($height) && ($height = $width);
         $bgcolor = hex2rgb($bgcolor);
         $color = hex2rgb($color);
         empty($text) && ($text = $width . ' x ' . $height);
         //$hash_key = md5(serialize(compact('width','height','bgcolor','color','text')));
         // Create image
         $image = imagecreate($width, $height);
         // Colours
         $setbg = imagecolorallocate($image, $bgcolor['r'], $bgcolor['g'], $bgcolor['b']);
         $fontcolor = imagecolorallocate($image, $color['r'], $color['g'], $color['b']);
         // Text positioning
         empty($fontsize) && ($fontsize = $width > $height ? $height / 10 : $width / 10);
         $font = APPPATH . 'static/common/fonts/msyh.ttf';
         $fontbox = calculate_textbox($fontsize, 0, $font, $text);
         // Generate text
         function_exists('imageantialias') && imageantialias($image, true);
         imagettftext($image, $fontsize, 0, ceil(($width - $fontbox['width']) / 2 + $fontbox['left']), ceil(($height - $fontbox['height']) / 2 + $fontbox['top']), $fontcolor, $font, $text);
         // Render image
         imagepng($image, $cache_filepath);
         imagedestroy($image);
     }
     return response()->preview($cache_filepath, ['Content-Type' => 'image/png']);
 }

 public function getTextColor()
 {
     if (!\thebuggenie\core\framework\Context::isCLI()) {
         \thebuggenie\core\framework\Context::loadLibrary('ui');
     }
     $rgb = hex2rgb($this->_itemdata);
     return 0.299 * $rgb['red'] + 0.587 * $rgb['green'] + 0.114 * $rgb['blue'] > 170 ? '#333' : '#FFF';
 }

function getColorForGradient($color, $opacity)
{
    $color = trim($color);
    if (substr($color, 0, 1) == '#') {
        $rgb = hex2rgb($color);
        $color = 'rgba(' . implode(',', $rgb) . ',' . number_format($opacity, 2, '.', '') . ')';
    }
    return $color;
}

function redimensionner_image($image_source, $largeur_max, $hauteur_max, $sauvegarder = false, $image_destination = '', $fix = false, $fix_couleur = 'f00')
{
    list($largeur_source, $hauteur_source, $type_source, ) = getimagesize($image_source);
    $mime_source = image_type_to_mime_type($type_source);
    $largeur_final = $largeur_max;
    $hauteur_final = $hauteur_max;
    /* Origine de l'image : Par défaut à zéro */
    $origine_x = 0;
    $origine_y = 0;
    if ($largeur_source < $largeur_final) {
        $largeur_final = $largeur_source;
    }
    // Teste les dimensions tenant dans la zone
    $test_h = round($largeur_final / $largeur_source * $hauteur_source);
    $test_w = round($hauteur_final / $hauteur_source * $largeur_source);
    if (!$hauteur_final) {
        // Si Height final non précisé (0)
        $hauteur_final = $test_h;
    } elseif (!$largeur_final) {
        // Sinon si Width final non précisé (0)
        $largeur_final = $test_w;
    } elseif ($test_h > $hauteur_final) {
        // Sinon test quel redimensionnement tient dans la zone
        $largeur_final = $test_w;
    } else {
        $hauteur_final = $test_h;
    }
    if ($mime_source == 'image/jpeg') {
        $img_in = imagecreatefromjpeg($image_source);
    } elseif ($mime_source == 'image/png') {
        $img_in = imagecreatefrompng($image_source);
    } elseif ($mime_source == 'image/gif') {
        $img_in = imagecreatefromgif($image_source);
    } else {
        return false;
    }
    if ($fix) {
        $img_out = imagecreatetruecolor($largeur_max, $hauteur_max);
        if ($largeur_final < $largeur_max) {
            $origine_x = round(($largeur_max - $largeur_final) / 2);
        }
        if ($hauteur_final < $hauteur_max) {
            $origine_y = round(($hauteur_max - $hauteur_final) / 2);
        }
        $couleurs = hex2rgb($fix_couleur);
        $fond = ImageColorAllocate($img_out, $couleurs[0], $couleurs[1], $couleurs[2]);
        imagefill($img_out, 0, 0, $fond);
    } else {
        $img_out = imagecreatetruecolor($largeur_final, $hauteur_final);
    }
    imagecopyresampled($img_out, $img_in, $origine_x, $origine_y, 0, 0, $largeur_final, $hauteur_final, imagesx($img_in), imagesy($img_in));
    if ($sauvegarder) {
        imagejpeg($img_out, $image_destination);
    } else {
        imagejpeg($img_out, null, 100);
    }
}

function rgba($color, $opacity = 1, $retAsStr = false, $sep = ',')
{
    if (substr($color, 0, 1) == '#') {
        $color = substr($color, 1);
    }
    $color = hex2rgb($color);
    $color = array_merge($color, array('alpha' => $opacity));
    return $retAsStr ? implode($sep, $color) : $color;
}

/**
 * Convert hexadecimal/alpha colors to rgba
 * 
 * @since IS Simple 1.0
 * 
 * @param	array	$hexalpha	Array where $hexalpha['color'] is the hexadecimal color and
 * 								$hexalpha['alpha'] is the opacity code
 * @return	string				Hexadecial/alpha color array converted to rgba color code
 * ============================================================================
 */
function hexalpha2rgba($hexalpha)
{
    $hex = $hexalpha['color'];
    $rgb = hex2rgb($hex);
    $alpha = $hexalpha['alpha'];
    $rgba = $rgb . ',' . $alpha;
    return $rgba;
    // Return string separated by commas
}

function rgbConvert($str)
{
    //echo($str.strpos($str,","));
    if (strpos($str, ",")) {
        //echo "rgb2array";
        return rgb2array($str);
    } else {
        //echo "hex2rgb";
        return hex2rgb($str);
    }
}

function getShadow($b, $t)
{
    $b = hex2rgb($b);
    $t = hex2rgb($t);
    $c = array();
    foreach ($b as $k => $v) {
        $a = abs($t[$k] - $v);
        array_push($c, abs($a - ($a < 16 || $a > 239 ? round($a / 2) : 0)));
    }
    return 'rgb(' . implode(',', $c) . ')';
}

 function color_check($colors, $alpha)
 {
     $opacity = array('1', '1.0');
     if ($colors != '') {
         if (!in_array($alpha, $opacity)) {
             $color = 'rgba(' . hex2rgb($colors) . ',' . $alpha . ')';
         } else {
             $color = $colors;
         }
     } else {
         $color = '';
     }
     return $color;
 }

function colourBlend($col1, $col2, $factor)
{
    $col1RGB = hex2rgb(prepareHex($col1));
    $col2RGB = hex2rgb(prepareHex($col2));
    $blend = array();
    //echo ('/*');
    for ($i = 0; $i < 3; $i++) {
        $min = min($col1RGB[$i], $col2RGB[$i]);
        $max = max($col1RGB[$i], $col2RGB[$i]);
        $blend[$i] = round($min + ($max - $min) * $factor);
        //echo ($i .': min '. $min . ', max '. $max .' = '.  $blend[$i].'\n\r' );
    }
    //echo ('*/');
    return rgb2hex($blend);
}

/**
 * Add a Minecraft color coded string to an image.
 * @param $img
 * @param $font
 * @param $fontSize
 * @param $startX
 * @param $startY
 * @param $string
 */
function addMCColorString(&$img, $font, $fontSize, $startX, $startY, $string)
{
    $MCColors = ["0" => "#000000", "1" => "#0000AA", "2" => "#008000", "3" => "#00AAAA", "4" => "#AA0000", "5" => "#AA00AA", "6" => "#FFAA00", "7" => "#AAAAAA", "8" => "#555555", "9" => "#5555FF", "a" => "#3CE63C", "b" => "#55FFFF", "c" => "#FF5555", "d" => "#FF55FF", "e" => "#FFFF55", "f" => "#FFFFFF"];
    if (strpos($string, "§") === false) {
        $string = '§7' . $string;
    }
    $currentX = $startX;
    $currentY = $startY + 16;
    foreach (explode("§", $string) as $part) {
        $rgb = hex2rgb($MCColors[substr($part, 0, 1)]);
        $color = imagecolorallocate($img, $rgb[0], $rgb[1], $rgb[2]);
        $part = substr($part, 1);
        $bbox = imagettftext($img, $fontSize, 0, $currentX, $currentY, $color, $font, $part);
        $currentX += $bbox[4] - $bbox[0];
    }
}

function Scaffold_background_rgba($params)
{
    $color_names = get_color_names();
    $params = explode(',', $params);
    if (color_type($params[0]) == 'hexadecimal') {
        $rgb = hex2rgb($params[0]);
        $rgba = array($rgb[0], $rgb[1], $rgb[2], $params[1]);
    } else {
        if (color_type($params[0]) == 'colorname') {
            $rgba = array($color_names[$params[0]][0], $color_names[$params[0]][1], $color_names[$params[0]][2], $params[1]);
        } else {
            $rgba = $params;
        }
    }
    list($r, $g, $b, $a) = $rgba;
    return Rgba::create_rgba($r, $g, $b, $a);
}