So erstellen Sie mit PHP stapelweise Logos verschiedener Größen

Dieser Artikel stellt hauptsächlich den Kerncode von Methoden und Beispielen für die Batch-Generierung von Logos verschiedener Größen in PHP vor. Sie können ihn hier nachschlagen, wenn Sie ihn benötigen.

Verwenden Sie PHP GD, das einfach zu verwenden ist. Sie können es mit einem Klick in verschiedene Größen schneiden und zum Herunterladen verpacken. Diejenigen, die häufig Symbole wechseln, wissen, dass der Künstler Ihnen ein 1024-Logo gibt und Sie es mit Photoshop in verschiedene Größen bringen müssen, also haben wir uns dieses Ding ausgedacht.

Der Code lautet wie folgt:

<?php
class image {
    /**
     * source image
     *
     * @var string|array
     */
    private $source;
    /**
     * temporay image
     *
     * @var file
     */
    private $image;
    private $ext;
    /**
     * erros
     *
     * @var array
     */
    private $error;
    /**
     * construct
     *
     * @param string|array $source
     */
    public function __construct($source = NULL) {
        if($source != NULL) {
            $this->source($source);
        }
    }
    /**
     * set the source image
     *
     * @param string|array $source
     */
    public function source($source) { 
        if(!is_array($source)) {
            $this->source["name"] = $source;
            $this->source["tmp_name"] = $source;
            $type = NULL;
            $ext = strtolower(end(explode(".",$source)));
            switch($ext) {
                case "jpg"  : 
                case "jpeg" : $type = "image/jpeg"; break;
                case "gif"  : $type = "image/gif"; break;
                case "png"  : $type = "image/png"; break;
            }
            $this->source["type"] = $type;
        } else {
            $this->source = $source;
        }
        $this->destination = $this->source["name"];
    }
    /**
     * resize the image
     *
     * @param int $width
     * @param int $height
     */
    public function resize($width = NULL,$height = NULL) {
        if(isset($this->source["tmp_name"]) && file_exists($this->source["tmp_name"])) {
            list($source_width,$source_height) = getimagesize($this->source["tmp_name"]);
            if(($width == NULL) && ($height != NULL)) {
                $width = ($source_width * $height) / $source_height;
            }
            if(($width != NULL) && ($height == NULL)) {
                $height = ($source_height * $width) / $source_width;
            }
            if(($width == NULL) && ($height == NULL)) {
                $width = $source_width;
                $height = $source_height;
            }
            switch($this->source["type"]) {
                case "image/jpeg" : $created = imagecreatefromjpeg($this->source["tmp_name"]); break;
                case "image/gif"  : $created = imagecreatefromgif($this->source["tmp_name"]);  break;
                case "image/png"  : $created = imagecreatefrompng($this->source["tmp_name"]);  break;
            }
            $this->image = imagecreatetruecolor($width,$height);
            imagecopyresampled($this->image,$created,0,0,0,0,$width,$height,$source_width,$source_height);
        }
    }
    /**
     * add watermark on image
     *
     * @param string $mark
     * @param int $opac
     * @param int $x_pos
     * @param int $y_pos
     */
    public function watermark($mark,$opac,$x_pos,$y_pos) {
        if(file_exists($mark) && ($this->image != "")) {
            $ext = strtolower(end(explode(".",$mark)));
            switch($ext) {
                case "jpg"  : 
                case "jpeg" : $watermark = imagecreatefromjpeg($mark); break;
                case "gif"  : $watermark = imagecreatefromgif($mark);  break;
                case "png"  : $watermark = imagecreatefrompng($mark);  break;
            }
            list($watermark_width,$watermark_height) = getimagesize($mark);
            $source_width = imagesx($this->image);
            $source_height = imagesy($this->image);
            if($x_pos == "top") $pos  = "t"; else $pos  = "b";
            if($y_pos == "left") $pos .= "l"; else $pos .= "r";
            $dest_x = 0; 
            $dest_y = 0; 
            switch($pos) {
                case "tr" : $dest_x = $source_width - $watermark_width; break;
                case "bl" : $dest_y = $source_height - $watermark_height; break;
                case "br" : $dest_x = $source_width - $watermark_width; $dest_y = $source_height - $watermark_height; break;
            }
            imagecopymerge($this->image,$watermark,$dest_x,$dest_y,0,0,$watermark_width,$watermark_height,$opac);
        }
    }
    /**
     * crop the image
     *
     * @param int $x
     * @param int $y
     * @param int $width
     * @param int $height
     */
    public function crop($x,$y,$width,$height) {
        if(isset($this->source["tmp_name"]) && file_exists($this->source["tmp_name"]) && ($width > 10) && ($height > 10)) {
            switch($this->source["type"]) {
                case "image/jpeg" : $created = imagecreatefromjpeg($this->source["tmp_name"]); break;
                case "image/gif"  : $created = imagecreatefromgif($this->source["tmp_name"]);  break;
                case "image/png"  : $created = imagecreatefrompng($this->source["tmp_name"]);  break;
            }           
            $this->image = imagecreatetruecolor($width,$height);
            imagecopy($this->image,$created,0,0,$x,$y,$width,$height);
        }
    }
    /**
     * create final image file 
     *
     * @param string $destination
     * @param int $quality
     */
    public function create($destination,$quality = 100) {
        if($this->image != "") {
            $extension = substr($destination,-3,3);
            switch($extension) {
                case "gif" :  
                    imagegif($this->image,$destination,$quality); 
                    break;
                case "png" :
                    $quality = ceil($quality/10) - 1;
                    imagepng($this->image,$destination,$quality); 
                    break;
                default    : 
                    imagejpeg($this->image,$destination,$quality); 
                    break;
            }
        }
    }
    /**
     * check if extension is valid
     *
     */
    public function validate_extension() {
        if(isset($this->source["tmp_name"]) && file_exists($this->source["tmp_name"])) {
            $exts = array("image/jpeg", "image/pjpeg", "image/png", "image/x-png");
            $ext = $this->source["type"];
            $valid = 0;
            $this->ext = &#39;.not_found&#39;;
            if ($ext == $exts[0] || $ext == $exts[1]) {
                $valid = 1;
                $this->ext = &#39;.jpg&#39;;
            }
            // if ($ext == $exts[2]) {
            //  $valid = 1;
            //  $this->ext = &#39;.gif&#39;;
            // }
            if ($ext == $exts[2] || $ext == $exts[3]) {
                $valid = 1;
                $this->ext = &#39;.png&#39;;
            }
            if($valid != 1) {
                $this->error .= "extension";
            }
        } else {
            $this->error .= "source";
        }
    }
    /**
     * check if the size is correct
     *
     * @param int $max
     */
    public function validate_size($max) {
        if(isset($this->source["tmp_name"]) && file_exists($this->source["tmp_name"])) {
            $max = $max * 1024;
            if($this->source["size"] >= $max) {
                $this->error .= "size";
            }
        } else {
            $this->error .= "source";
        }
    }
    /**
     * check if the dimension is correct
     *
     * @param int $limit_width
     * @param int $limit_height
     */
    public function validate_dimension($limit_width,$limit_height) {
        if(isset($this->source["tmp_name"]) && file_exists($this->source["tmp_name"])) {
            list($source_width,$source_height) = getimagesize($this->source["tmp_name"]);
            if(($source_width > $limit_width) || ($source_height > $limit_height)) {
                $this->error .= "dimension";
            }
        } else {
            $this->error .= "source";
        }
    }
    /**
     * get the found errors
     *
     */
    public function error() {
        $error = array();
        if(stristr($this->error,"source")) $error[] = "找不到上传文件";
        if(stristr($this->error,"dimension")) $error[] = "上传图片尺寸太大";
        if(stristr($this->error,"extension")) $error[] = "不符合要求的格式";
        if(stristr($this->error,"size")) $error[] = "图片文件太大";
        return $error;
    }
    public function error_string() {
        $error = "";
        if(stristr($this->error,"source")) $error .= "找不到上传文件 / ";
        if(stristr($this->error,"dimension")) $error .= "上传图片尺寸太大 / ";
        if(stristr($this->error,"extension")) $error .= "不符合要求的格式 / ";
        if(stristr($this->error,"size")) $error .= "图片文件太大 / ";
        if(eregi(" / $", $error)) {
            $error = substr($error, 0, -3);
        }
        return $error;
    }
    public function ext() {
        return $this->ext;
    }
}

Zusammenfassung: Das Obige ist der gesamte Inhalt dieses Artikels, ich hoffe, dass er für das Lernen aller hilfreich sein wird.

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