PHP uploads files to the server and implements image preview-PHP Tutorial-php.cn

PHP uploads files to the server and implements image preview

小云云

Release： 2023-03-22 10:24:02

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In the process of background development, it is often necessary for the application to upload files to the server. This article mainly shares with you PHP to upload files to the server and implement image preview. I hope it can help everyone.

1. Backend request address page operation (can also be the current page):

<?php
    header(&#39;content-type:text/html,charset=gbk&#39;);
?>

<?php

    if(!empty($_FILES)){

        $current_img = $_FILES[&#39;lgc_img&#39;];
        $http_path = dirname(&#39;http://&#39;.$_SERVER[&#39;HTTP_HOST&#39;].$_SERVER[&#39;REQUEST_URI&#39;]).&#39;/images/&#39;.$current_img[&#39;name&#39;];

        $file_dir = dirname(__FILE__).&#39;/images/&#39;.$current_img[&#39;name&#39;];

        echo $current_img[&#39;tmp_name&#39;].&#39;<br/>&#39;;

        echo $file_dir;

        $bool = @move_uploaded_file($current_img[&#39;tmp_name&#39;],$file_dir);

    }
?>

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2. Frontend form page:

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title></title>
</head>

<body>
    <form action="" method="post" enctype="multipart/form-data">
        <input type="hidden" name="MAX_FILE_SIZE" value="1000000" /> 上传文件:
        <input type="file" name="lgc_img" />
        <input type="submit" name="submit" value="提交" />
    </form>
<?php 
    if(@$bool)
    {
?>
    <img src=&#39;<?php echo $http_path; ?>&#39; width=&#39;10%&#39; />
<?php
    }
?>
</body>

</html>

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* This case action="" indicates the requested current page

* Summary: $_FILES and move_uploaded_file() are mainly used

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