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Encapsulation class for adding, compressing and cutting PHP image watermarks
Encapsulation class for adding, compressing and cutting PHP image watermarks
phpThe operation of picture files mainly uses GD library extension. When we frequently use php to operate images, we will naturally encapsulate many functions , otherwise we will write too much repeated code. When there are many functions related to pictures, we can consider sorting out these php functions, so we have the idea of encapsulating them into classes. Then let’s take a look at how it is packaged below!
There are four main steps to operating a picture:
Open the picture
##Operation Picture
Output picture
-
Destroy picture
<?php
class Image
{
private $info; private $image; public $type; public function construct($src)
{
$this->info=getimagesize($src);
$this->type=image_type_to_extension($this->info['2'],false);
$fun="imagecreatefrom{$this->type}";
$this->image=$fun($src);
} /**
* 文字水印
* @param [type] $font 字体
* @param [type] $content 内容
* @param [type] $size 文字大小
* @param [type] $col 文字颜色（四元数组）
* @param array $location 位置
* @param integer $angle 倾斜角度
* @return [type]
*/
public function fontMark($font,$content,$size,$col,$location,$angle=0){
$col=imagecolorallocatealpha($this->image, $col['0'], $col['1'], $col['2'],$col['3']);
imagettftext($this->image, $size, $angle, $location['0'], $location['1'], $col,$font,$content);
}
/**
* 图片水印
* @param [type] $imageMark 水印图片地址
* @param [type] $dst 水印图片在原图片中的位置
* @param [type] $pct 透明度
* @return [type]
*/
public function imageMark($imageMark,$dst,$pct){
$info2=getimagesize($imageMark);
$type=image_type_to_extension($info2['2'],false);
$func2="imagecreatefrom".$type;
$water=$func2($imageMark);
imagecopymerge($this->image, $water, $dst[0], $dst[1], 0, 0, $info2['0'], $info2['1'], $pct);
imagedestroy($water);
} /**
* 压缩图片
* @param [type] $thumbSize 压缩图片大小
* @return [type] [description] */
public function thumb($thumbSize){
$imageThumb=imagecreatetruecolor($thumbSize[0], $thumbSize[1]);
imagecopyresampled($imageThumb, $this->image, 0, 0, 0, 0, $thumbSize[0], $thumbSize[1], $this->info['0'], $this->info['1']);
imagedestroy($this->image);
$this->image=$imageThumb;
} /**
* 裁剪图片
* @param [type] $cutSize 裁剪大小
* @param [type] $location 裁剪位置
* @return [type] [description] */
public function cut($cutSize,$location){
$imageCut=imagecreatetruecolor($cutSize[0],$cutSize[1]);
imagecopyresampled($imageCut, $this->image, 0, 0, $location[0], $location[1],$cutSize[0],$cutSize[1],$cutSize[0],$cutSize[1]);
imagedestroy($this->image);
$this->image=$imageCut;
} /**
* 展现图片
* @return [type] [description] */
public function show(){
header("content-type:".$this->info['mime']);
$funn="image".$this->type;
$funn($this->image);
} /**
* 保存图片
* @param [type] $newname 新图片名
* @return [type] [description] */
public function save($newname){
header("content-type:".$this->info['mime']);
$funn="image".$this->type;
$funn($this->image,$newname.'.'.$this->type);
} public function destruct(){
imagedestroy($this->image);
}
} ?>Related recommendations:
Detailed tutorial on how to use the GD library to complete the verification code effect in PHP
How to open the GD library in php?
php Use GD library to generate high-quality thumbnail image sample code
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