PHP implements batch generation of App logos of various sizes, phpapp size logo_PHP tutorial

PHP realizes batch generation of App logos of various sizes, phpapp size logos

Use PHP GD, easy to use, cut various sizes with one click, package and download. Those who often change icons will know that the artist will give you a 1024 logo, and you have to photoshop it into various sizes, so we came up with this thing.

Core Code

复制代码 代码如下:
class image {
    /**
     * source image
     *
     * @var string|array
    */
    private $source;
    /**
     * temporay image
     *
     * @var file
    */
    private $image;
    private $ext;
    /**
     * errors
     *
     * @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;
            $this->ext = '.not_found';
            if ($ext == $exts[0] || $ext == $exts[1]) {
                $valid = 1;
                $this->ext = '.jpg';
            }
            // if ($ext == $exts[2]) {
            //  $valid = 1;
            //  $this->ext = '.gif';
            // }
            if ($ext == $exts[2] || $ext == $exts[3]) {
                $valid = 1;
                $this->ext = '.png';
            }
            if($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 .= "The picture file is too large / ";
If(eregi(" / $", $error)) {
               $error = substr($error, 0, -3);
}
          return $error;
}
Public function ext() {
          return $this->ext;
}
}

That’s all the content of this article, I hope you all like it.