Comment générer par lots des logos de différentes tailles en utilisant PHP

Cet article présente principalement le code de base des méthodes et des exemples de génération par lots de logos de différentes tailles en PHP. C'est très simple et pratique. Il est recommandé ici aux amis. Vous pouvez vous y référer si vous en avez besoin.

Utilisez PHP GD, qui est facile à utiliser. Vous pouvez couper différentes tailles en un seul clic et le conditionner pour le téléchargement. Ceux qui changent souvent d'icône savent que l'artiste vous donnera un logo 1024 et que vous devrez le photoshoper en différentes tailles, nous avons donc ce truc.

Le code est le suivant :

<?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;
    }
}

Résumé : Ce qui précède est l'intégralité du contenu de cet article, j'espère qu'il sera utile à l'étude de chacun.

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