PHP笔记-文件上传例子- PHP

程序运行截图如下：

选择文件然后点击提交后：

目录下也有了：

源码如下：

index.html


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>文件上传</title>
</head>
<body>
    <form action="uploadFile.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" value="提交">
    </form>
</body>
</html>

uploadFile.php


<?php
    $allowed = array("gif", "png", "jpg");
    $temp = explode(".", $_FILES["file"]["name"]);
    $extension = end($temp);
    echo $_FILES["file"]["size"];
 
    if ((($_FILES["file"]["type"] == "image/gif")
            || ($_FILES["file"]["type"] == "image/jpeg")
            || ($_FILES["file"]["type"] == "image/jpg")
            || ($_FILES["file"]["type"] == "image/pjpeg")
            || ($_FILES["file"]["type"] == "image/x-png")
            || ($_FILES["file"]["type"] == "image/png"))
        && ($_FILES["file"]["size"] < 2048000)
        && in_array($extension, $allowed)){
 
        if($_FILES["file"]["error"] > 0){
 
            echo "错误 : " . $_FILES["file"]["error"] . "<br>";
            header("Refresh:3;url=index.html");
        }
 
        echo "上传的文件名: " . $_FILES["file"]["name"] . "<br>";
        echo "文件类型: " . $_FILES["file"]["type"] . "<br>";
        echo "文件大小: " . $_FILES["file"]["size"] . "<br>";
        echo "文件临时存放位置:" . $_FILES["file"]["tmp_name"] . "<br>";
 
        if(file_exists("upload" . $_FILES["file"]["name"])){
 
            echo $_FILES["file"]["name"] . "文件已经存在。";
        }
        else{
 
            move_uploaded_file($_FILES["file"]["tmp_name"], __DIR__ . "\\upload\\" . $_FILES["file"]["name"]);
            echo "文件存储在: " . __FILE__ . "\\upload\\" . $_FILES["file"]["name"];
        }
    }
    else{
 
        header("Refresh:3;url=index.html");
    }
?>