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PHP basics four - file uploadApr 26, 2018 pm 02:22 PM
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The content introduced in this article is about the basics of PHP, which has certain reference value. Now I share it with everyone. Friends in need can refer to it

<!-- 文件上传 -->
<form action="" enctype="multipart/form-data" method="post">
    <input type="file" name="文件"/><br />
    <input type="submit" value="上传"/>
</form>
<?php
//文件上传之需要注意php.ini文件
//     php.ini文件中的配置
//     file_uploads
//     post_max_size
//     upload_max_filesize
//     memory_limit
// print_r($_FILES["upfile"]);
if (is_uploaded_file($_FILES[&#39;upfile&#39;][&#39;tmp_name&#39;])) {
    $upfile=$_FILES["upfile"];
    $name=$upfile["name"];
    $type=$upfile["type"];
    $size=$upfile["size"];
    $tmp_name=$upfile["tmp_name"];
    
    switch ($type) {
        case &#39;image/pjpeg&#39;:
            $okType=true;
            break;
        case &#39;image/jpeg&#39;:
            $okType=true;
            break;
        case &#39;image/gif&#39;:
            $okType=true;
            break;
        case &#39;image/png&#39;:
            $okType=true;
            break;
    }
    if ($okType) {
        $error=$upfile["error"];
        echo "==================<br/>";
        echo "上传的文件名称是:".$name."<br/>";
        echo "上传的文件类型是:".$type."<br/>";
        echo "上传的文件大小是:".$size."<br/>";
        echo "上传之后系统返回的值是:".$error."<br/>";
        echo "上传的文件临时存放的文件路径是:".$tmp_name."<br/>";
        
        echo "开始移动上传文件<br/>";
        move_uploaded_file($tmp_name, &#39;up/&#39;.$name);
        $destination="up/".$name;
        echo "================<br/>";
        echo "上传信息:<br/>";
        if ($error==0) {
            echo "文件上传成功!";
            echo "<br>图片预览<br>";
            echo "<img  src="/static/imghwm/default1.png"  data-src=".$destination."  class="lazy"   alt="PHP basics four - file upload" >";
        }elseif ($error==1){
            echo "超过了文件大小,在php.ini文件中设置";
        }elseif ($error==2){
            echo "超过文件的大小MAX_FILE_SIZE选项指定的值";
        }elseif ($error==3){
            echo "文件只有部分被上传";
        }elseif ($error==4){
            echo "上传文件大小为0";
        }
    }else {
        echo "请上传jpg,gif,png等格式的图片";
    }
}
?>

<!-- 文件上传的步骤 -->
<?php
//     一、判断是否有错误码
//     二、自定义判断是否超出文件大小范围
//     三、判断后缀名和mime类型是否符合
//     四、生成文件名
//     五、判断是否是上传文件
//     六、移动临时文件到指定位置
?>

<!-- 文件上传表单注意事项 -->
<html>
    <head>
        <meta charset="utf-8"/>
        <title>单文件上传</title>
    </head>
    <body>
        <form action="file.php" method="post"
        enctype="multipart/form-data">
        <input type="file" name="filename"/>
        <input type="submit" value="上传"/>
        </form>
    </body>
</html>

<!-- 按照数组和步骤完成文件上传 -->
<!-- 第一步,判断错误码 -->
<!-- 第二步,判断文件是否超出大小 -->
<!-- 第三步,判断文件的mime类型是否正确 -->
<!-- 第四步,生成指定的路径和文件名 -->
<!-- 第五步,判断是否是上传文件 -->
<!-- 第六步,移动文件到指定位置 -->
<form action=&#39;&#39; method=&#39;post&#39; enctype=&#39;multipart/form-data&#39;>
    <input type=&#39;file&#39; name=&#39;myfile&#39; />
    <input type="submit" />
</form>

<?php
    echo &#39;<pre class="brush:php;toolbar:false">&#39;;
    var_dump($_FILES[&#39;myfile&#39;]);
    echo &#39;
';          if ($_FILES['myfile']['error'] > 0) {         switch ($_FILES['myfile']['error']) {             case '1':                 echo '文件过大';                 break;             case '2':                 echo '文件超出指定大小';                 break;             case '3':                 echo '只有部分文件被上传';                 break;             case '4':                 echo '文件没有被上传';                 break;             case '6':                 echo '找不到指定文件';                 break;             case '7':                 echo '文件写入失败';                 break;             default:                 echo '上传出错
';             }     }else{         $MAX_FILE_SIZE = 100000;         if ($_FILES['myfile']['size'] > $MAX_FILE_SIZE) {             exit("文件超出指定大小");         }                  $allowSuffix = array('jpg','gif');                  $myImg = explode('.', $_FILES['myfile']['name']);         $myImgSuffix = array_pop($myImg);         if (!in_array($myImgSuffix, $allowSuffix)) {             exit("文件后缀名不符");         }         $allowMime = array(             "image/jpg",             "image/jpeg",             "image/pjpeg",             "image/gif"         );         if (!in_array($_FILES['myfile']['type'],              $allowMime)) {             exit('文件格式不正确,请检查');         }         $path = "upload/images/";         $name = data('Y').date('m').date("d")         .date('H').date('i').date('s').         rand(0,9).'.'.$myImgSuffix;                  if (is_uploaded_file($_FILES['file']['tmp_name'])) {             if (move_uploaded_file($_FILES['myfile']['tmp_name'], $path.$name)) {                 echo "上传成功";             }else {                 echo '上传失败';             }         }     } ?>                       单文件上传                   
                                               
    

Related recommendations:

php basic three

php basic two

php basic one


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