この記事では、PHP でのさまざまなサイズのロゴのバッチ生成のメソッドと例のコア コードを主に紹介します。必要な場合は、ここで参照することをお勧めします。
PHP GD を使用すると、使いやすく、ワンクリックでさまざまなサイズにカットし、パッケージ化してダウンロードできます。アイコンを頻繁に変更する人は知っていると思いますが、アーティストが 1024 のロゴを提供し、それをフォトショップでさまざまなサイズに変換する必要があるため、このようなものを思いつきました。
コードは次のとおりです:
<?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;
}
}概要: 上記がこの記事の全内容です。皆さんの学習に役立つことを願っています。
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