PHP圖片壓縮類,高清無損直接用就ok啦
阿新 • • 發佈:2018-12-30
cti ont extension open () arr from 保存圖片 打開
這個不完全是我自己寫的-_-!,但是好用呀
<?php /** * Created by PhpStorm. * Note:文件介紹 * User: Lynly * Date: 2018/11/19 * Time: 14:33 */ class Imgcompress { private $src; private $image; private $imageinfo; private $percent = 0.5; /** * 圖片壓縮 * @param string $src 源圖 * @param float $percent 壓縮比例 */ public function __construct($src, $percent = 1) { $this->src = $src; $this->percent = $percent; } /** 高清壓縮圖片 * @param string $saveName 提供圖片名(可不帶擴展名,用源圖擴展名)用於保存。或不提供文件名直接顯示 */ public function compressImg($saveName = ‘‘) { $this->_openImage(); if (!empty($saveName)) $this->_saveImage($saveName); //保存 else $this->_showImage(); } /** * 內部:打開圖片 */ private function _openImage() { list($width, $height, $type, $attr) = getimagesize($this->src); $this->imageinfo = array( ‘width‘ => $width, ‘height‘ => $height, ‘type‘ => image_type_to_extension($type, false), ‘attr‘ => $attr ); $fun = "imagecreatefrom" . $this->imageinfo[‘type‘]; $this->image = $fun($this->src); $this->_thumpImage(); } /** * 內部:操作圖片 */ private function _thumpImage() { $new_width = $this->imageinfo[‘width‘] * $this->percent; $new_height = $this->imageinfo[‘height‘] * $this->percent; $image_thump = imagecreatetruecolor($new_width, $new_height); //將原圖復制帶圖片載體上面,並且按照一定比例壓縮,極大的保持了清晰度 imagecopyresampled($image_thump, $this->image, 0, 0, 0, 0, $new_width, $new_height, $this->imageinfo[‘width‘], $this->imageinfo[‘height‘]); imagedestroy($this->image); $this->image = $image_thump; } /** * 輸出圖片:保存圖片則用saveImage() */ private function _showImage() { header(‘Content-Type: image/‘ . $this->imageinfo[‘type‘]); $funcs = "image" . $this->imageinfo[‘type‘]; $funcs($this->image); } /** * 保存圖片到硬盤: * @param string $dstImgName 1、可指定字符串不帶後綴的名稱,使用源圖擴展名 。2、直接指定目標圖片名帶擴展名。 */ private function _saveImage($dstImgName) { if (empty($dstImgName)) return false; $allowImgs = array(‘.jpg‘, ‘.jpeg‘, ‘.png‘, ‘.bmp‘, ‘.wbmp‘, ‘.gif‘); //如果目標圖片名有後綴就用目標圖片擴展名 後綴,如果沒有,則用源圖的擴展名 $dstExt = strrchr($dstImgName, "."); $sourseExt = strrchr($this->src, "."); if (!empty($dstExt)) $dstExt = strtolower($dstExt); if (!empty($sourseExt)) $sourseExt = strtolower($sourseExt); //有指定目標名擴展名 if (!empty($dstExt) && in_array($dstExt, $allowImgs)) { $dstName = $dstImgName; } elseif (!empty($sourseExt) && in_array($sourseExt, $allowImgs)) { $dstName = $dstImgName . $sourseExt; } else { $dstName = $dstImgName . $this->imageinfo[‘type‘]; } $funcs = "image" . $this->imageinfo[‘type‘]; $funcs($this->image, $dstName); } /** * 銷毀圖片 */ public function __destruct() { imagedestroy($this->image); }}
PHP圖片壓縮類,高清無損直接用就ok啦