php一个图片采集程序 图片采集类

<?php
class Collection{
protected $url; //采集地址
protected $prefix; //重命名文件前缀
protected $style; //需要采集的图片格式，传入一个数组
const prel = '/(?:http?|https?)://(?:[^./()?]+).(?:[^./]+). (?:com|cn|net|org)/(?:[^.:"'()?]+).(jpg|png|gif) /i'; //采集规则
//构造函数
function __construct($url,$prefix,$style){
switch($this->checkdata($url,$prefix,$style)){
case 1:
echo '<script>alert("采集地址不能为空！")</script>';
exit;
break;
case 2:
echo '<script>alert("需要采集的图片格式，应该为数组！")</script>';
exit;
break;
case 3:
echo '<script>alert("需要采集的图片格式，不能为空！")</script>';
exit;
break;
case 4:
echo '<script>alert("文件名不能含有. / |或用空格开头！")</script>';
exit;
}
$this->url = $url;
$this->prefix = $prefix;
$this->style = $style;
}
//开始采集数据
public function action(){
$url = $this->checkurl();
$imgurl = $this->collecturl($url);
$this->savafile($imgurl);
}
//url处理
protected function checkurl(){
$munprel = '/([0-9]+,[0-9]+)/i';
$myurl;
if(preg_match($munprel,$this->url,$arr)){
$temp = substr($arr[0],1,strlen($arr[0])-2);
$mymunber = explode(',',$temp);
$temparr = explode($arr[0],$this->url);
for($i=$mymunber[0];$i<=$mymunber[1];$i++){
$myurl[] = $temparr[0].$i.$temparr[1];
}
}else{
$myurl = $this->url;
}
return $myurl;
}
//文件保存
protected function savafile($imgurl){
if(!empty($imgurl)){
foreach($imgurl[0] as $key=>$value){
$filename = '';
if(in_array($imgurl[1][$key],$this->style)){
$size = @getimagesize($value);
if($size === false){
continue;
}
list($w,$h,$t,$a) = $size;
if($w<200 || $h<200){
continue;
}
ob_start();
readfile($value);
$obj = ob_get_contents();
ob_end_clean();
$dir = 'F:/php/';
if(!is_dir($dir)){
mkdir($dir,0777);
}
if(!empty($this->prefix)){
$filename = $dir.$this->prefix.date('Ymd').rand(10000,99999).'.'.$imgurl[1][$key];
}else{
$filename = $dir.date('Ymd').rand(10000,99999).'.'.$imgurl[1][$key];
}
$fo = @fopen($filename,'wb');
if($fo === false){
echo '<script>alert("创建文件失败，文件目录不可写！")</script>';
exit;
}
$fw = fwrite($fo,$obj);
echo '<p style="width:350px;background:#ddd;">'.$filename.'采集成功</p>';
}
}
}
}

//地址采集函数,包括图片后缀名
protected function collecturl($url){
set_time_limit(0);
if(is_array($url)){
$arr = array();
$imgkey = array();
foreach($url as $value){
$code = file_get_contents($value);

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