PHP抓取远程图片到本地保存

Posted 2020-10-31 叮叮_dzp

/**
* php将网页上的图片攫取到本地存储
* @param $imgUrl 图片url地址
* @param string $saveDir 本地存储路径 默认存储在当前路径
* @param null $fileName 图片存储到本地的文件名
* @return mix
*/
function crabImage($imgUrl, $saveDir=‘./‘, $fileName=null){
if(empty($imgUrl)){
return false;
}

//获取图片信息大小
$imgSize = getImageSize($imgUrl);
if(!in_array($imgSize[‘mime‘],array(‘image/jpg‘, ‘image/gif‘, ‘image/png‘, ‘image/jpeg‘),true)){
return false;
}

//获取后缀名
$_mime = explode(‘/‘, $imgSize[‘mime‘]);
$_ext = ‘.‘.end($_mime);

if(empty($fileName)){ //生成唯一的文件名
$fileName = uniqid(time(),true).$_ext;
}

//开始攫取
ob_start();
readfile($imgUrl);
$imgInfo = ob_get_contents();
ob_end_clean();

if(!file_exists($saveDir)){
mkdir($saveDir,0777,true);
}
$fp = fopen($saveDir.$fileName, ‘a‘);
$imgLen = strlen($imgInfo); //计算图片源码大小
$_inx = 1024; //每次写入1k
$_time = ceil($imgLen/$_inx);
for($i=0; $i<$_time; $i++){
fwrite($fp,substr($imgInfo, $i*$_inx, $_inx));
}
fclose($fp);

return array(‘file_name‘=>$fileName,‘save_path‘=>$saveDir.$fileName);
}

$url = ‘https://mmbiz.qlogo.cn/mmbiz/7WQtTI9h56hgvOH8J0Xp5v97cDNOxf94vq0NdNOhZmb2ZiaJLfwd2U8gNoEvTQXdWlRPOuibkkSebexmR2epE0pQ/0?wx_fmt=gif‘;
//$url = ‘http://www.phpernote.com/images/logo.gif‘;
//$url = ‘http://avatar.csdn.net/5/3/6/1_u014236259.jpg‘;

var_dump( crabImage($url) );