PHP实现批量生成App各种尺寸Logo

使用PHP GD，使用良好，一键剪裁各种尺寸，打包下载。经常换icon的懂的，美工给你一个1024的logo，你得ps出各种尺寸，于是有了这个东西。

核心代码

<?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 = '.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 .= "图片文件太大 / ";

        if(eregi(" / $", $error)) {

            $error = substr($error, 0, -3);

        }

        return $error;

    }

    public function ext() {

        return $this->ext;

    }

}

以上就是本文所述的全部内容了，希望大家能够喜欢。