PHP图片上传

  upload.html

<form action="upload.php" method="post" enctype="multipart/form-data">
    <label for="file">文件名：</label>
    <input type="file" name="file" id="file"><br>
    <input type="submit" name="submit" value="提交">
</form>

html文件form表单上传文件必须以 post 方式且需要着重加 enctype="multipart/form-data"

  upload.php

<?php
    if ($_FILES["file"]["error"]>0) return "错误：".$_FILES["file"]["error"];

    $allowedExts = array("gif", "jpeg", "jpg", "png");//设置格式
    $allowedType = array("image/gif", "image/jpeg", "image/jpg", "image/pjpeg","image/x-png","image/png");//设置类型
    $maxSize = 3145728;//设置文件大小
    $savePath = './Uploads/Dataexcel/pushimg/';//设置文件上传目录
    $newPath = time();//设置文件命名规则
    /*============================分割线================================*/
    $temp = explode(".", $_FILES["file"]["name"]);
    $extension = end($temp);        // 获取文件后缀名

    //验证文件格式
    if (!in_array($extension, $allowedExts) && in_array($_FILES["file"]["type"], $allowedType)) return "文件格式错误！";

    //判断文件大小
    if ($_FILES["file"]["size"] > $maxSize) return "文件过大！";

    mkdir($savePath, 0777);//创建文件上传目录
    rename($_FILES["file"]["name"],$newPath.'.'.$extension);//重命名
    // 将文件上传到 ./Uploads/Dataexcel/pushimg/ 目录下
    $fileup = move_uploaded_file($_FILES["file"]["tmp_name"], $savePath . $newPath.'.'.$extension);

    if ($fileup != true) return "文件上传失败！";

    //成功返回文件信息
    return array(
        'name'=>$_FILES["file"]["name"],
        'type'=>$_FILES["file"]["type"],
        'size'=>$_FILES["file"]["size"],
        'extension'=>$extension,
        'savepath'=>$savePath,
        'savename'=>$newPath.'.'.$extension,
    );