<?php
class imgcompress
{
private $src;
private $image;
private $imageinfo;
private $percent = 0.5;
public function __construct($src, $percent = 1)
{
$this->src = $src;
$this->percent = $percent;
}
public function compressImg($saveName = '')
{
$this->_openImage();
if (! empty($saveName))
$this->_saveImage($saveName); // 儲存
else
$this->_showImage();
return true;
}
private function _openImage()
{
list ($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();
}
private function _thumpImage()
{
// $this->percent = $this->imageinfo['width'] ;
$new_width = $this->imageinfo['width'] * $this->percent;
$new_height = $this->imageinfo['height'] * $this->percent;
// $new_width = 1200;
// $new_height = 900;
$image_thump = imagecreatetruecolor($new_width, $new_height);
// 将原圖複制帶圖檔載體上面,并且按照一定比例壓縮,極大的保持了清晰度
imagecopyresampled($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;
// $this->image = imagerotate($this->image, 270, 0);
}
private function _showImage()
{
header('Content-Type: image/' . $this->imageinfo['type']);
$funcs = "image" . $this->imageinfo['type'];
$funcs($this->image);
}
private function _saveImage($dstImgName)
{
if (empty($dstImgName))
return false;
$allowImgs = [
'.jpg',
'.jpeg',
'.png',
'.bmp',
'.wbmp',
'.gif'
]; // 如果目标圖檔名有字尾就用目标圖檔擴充名 字尾,如果沒有,則用源圖的擴充名
$dstExt = strrchr($dstImgName, ".");
$sourseExt = strrchr($this->src, ".");
if (! empty($dstExt))
$dstExt = strtolower($dstExt);
if (! empty($sourseExt))
$sourseExt = strtolower($sourseExt);
// 有指定目标名擴充名
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, $dstName);
}
public function __destruct()
{
if(!empty($this->image)){
imagedestroy($this->image);
}
}
public function getimg($to_source, $maxFileSize = 200)
{
$source_size = filesize($this->src) / 1024;
if ($source_size < $maxFileSize) {
copy($this->src, $to_source);
return true;
} else {
$ys = true;
$i = 0;
while ($ys) {
clearstatcache();
$this->percent = 0.7;
// $percent = 0.7;
if ($i > 0) {
$this->src = $to_source;
}
$image = $this->compressImg($to_source);
$to_source_size = filesize($to_source) / 1024;
// var_dump($to_source_size);
$ys = $to_source_size > $maxFileSize;
$i ++;
}
// echo "壓縮次數:" . $i;
}
return true;
}
}