jQuery+PHP base64图片上传

1.把base64编码的图片转换为Blob对象

   //base64编码转为Blob对象 
　　dataURLtoFile = function(dataurl, filename) {
        var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
            bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
        while(n--){
            u8arr[n] = bstr.charCodeAt(n);
        }
        var theBlob = new Blob([u8arr], {type: mime });
        theBlob.lastModifiedDate =new Date();
        theBlob.name = filename;
        return theBlob;
    }

2.用ajax上传图片

var form = new FormData();
$('.list img').each(function(){
    var filename = $(this).attr("alt");
    if(filename != "copy"){
    	form.append('images[]',dataURLtoFile($(this).attr("src"), filename),filename);
    }
});
$.ajax({
    url: 'url',
    async: true,
    type: 'post',
    data: form,
    processData: false,
    contentType: false,
    success: function(data){
	//TODO
    }
});

3.PHP对请求进行处理

public function uploadImages(){
    if(isset($_FILES["images"])){
        $tmp_name = $_FILES["images"]["tmp_name"];
        $name = $_FILES["images"]["name"];
        for($i = 0;$i < count($tmp_name);$i++){
            $fileinfo = pathinfo($name[$i]);
            //文件后缀名
            $fileext = strtolower($fileinfo["extension"]);
            if ( $fileext != 'png' && $fileext != 'jpg' && $fileext != 'gif' && $fileext != 'jpeg' ){
                continue;
            }

            if (!file_exists(IMAGE_TEMP_PATH)){
                mkdir(IMAGE_TEMP_PATH, 0777, true);
            }
            move_uploaded_file($tmp_name[$i], IMAGE_TEMP_PATH.$name[$i]);
            echo $_FILES["images"]["error"][$i];
        }
    }
}