PHP Core Programming-File upload (including multi-file upload)

Last Update:2017-09-06 Source: Internet

Author: User

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I. Single File Upload

Image upload Interface:

<!DOCTYPE HTML><HTMLLang= "en"><Head>    <MetaCharSet= "UTF-8">    <title>Document</title></Head><Body>     <formname= ' frm ' action= "./uploadsave.php"Method= "POST"enctype= "Multipart/form-data">         <inputtype= "File"name= "Upfile" ></input>         <inputtype= "Submit"name= "Submit"value= "Upload picture"></input>     </form></Body></HTML>

Upload Processing file:

<?PHPHeader(' Content-type:text/html;charset=utf-8 ');/** * Upload file: You can set the uploaded file type by the input parameters * upload file size limit, and upload the path * @param [type] $myupfile [form file field name] * @param [type] $maxsize [allowed Maximum allowable uploads] * @param [type] $arr _mime [allowed MIME type] * @param [type] $path [uploaded path] * @author Qinxiaoshou * September 6, 2017*/functionUploadFile ($myupfile,$maxsize,$arr _mine,$path) {        //determine if the file was uploaded via HTTP POST//if (Isset ($_post[' submit '))) {}        if(!Is_uploaded_file($myupfile[' Tmp_name '])) {            //Stop the script directly if there is an error            Echo"Upload error, please re-upload"; }        //determine if there is an error        if($myupfile[' Error ']) {            Echo"Upload error, please re-upload"; }        //determine file Size--do not allow uploading of files larger than 2M        if($myupfile[' Size '] >$maxsize) {            Echo"Upload file too large, please re-upload"; }        //get file name extension        $filename=$myupfile[' Name ']; ////Method One//strrpos calculates the last occurrence of the specified string in the target string//strrpos (haystack, needle);        Strrpos (sea, needles);        $index = Strrpos ($filename, '. ');        $ext = substr ($filename, $index);        echo "$ext"; Method Two//STRRCHR-finds the last occurrence of the specified character in the string        $ext=STRRCHR($filename,‘.‘);//. jpg//Echo $ext; Determine file type//process-oriented style        $fs=Finfo_open (Fileinfo_mime_type); $mine= Finfo_file ($fs,$myupfile[' Tmp_name ']); //file types allowed to upload//$arr _mine = [' Image/jpeg ', ' image/png ']; in_array-checks if a value exists in the array//in_array (needle, haystack)        if(!In_array($mine,$arr _mine)) {             die(' The file type is not correct, please re-upload '); }        //Building Temporary Files        $filename=$myupfile[' Tmp_name ']; //build target file//$path = './upload ';        $destination=$path.‘ /‘.Date(' Ymdhis ').$ext; //move the uploaded file to a new location return Boolean//move_uploaded_file (filename,destination)//move_uploaded_file (temporary file, custom destination file)        if(!Move_uploaded_file($filename,$destination)) {             die(' Upload failed! ')); }    }

Two, multi-file upload

<!DOCTYPE HTML><HTMLLang= "en"><Head>    <MetaCharSet= "UTF-8">    <title>Document</title></Head><Body>    <formname= ' frm 'Method= ' Post 'Action= ' upload.php 'enctype= "Multipart/form-data">        <Tablewidth= "50%"Border= "2"Align= "Center"rules= "All"cellpadding= "Ten">            <TR>                <thcolspan= "2">Upload file:<BR>                <inputtype= "File"name= "upload[]"></input><BR><BR>                <inputtype= "File"name= "upload[]"></input><BR><BR>                <inputtype= "File"name= "upload[]"></input><BR><BR>                <inputtype= "Submit"name= "Submit"value= "Upload"></input>                </th>            </TR>        </Table>    </form></Body></HTML>

Multi-File Upload processing:

<?PHPHeader(' Content-type:text/html;charset=utf-8 ');if(isset($_post[' Submit '])) {    /*echo "<pre>";    Print_r ($_files);    echo "</pre>"; echo "*/    $arr=$_files[' Upload ']; Echo"<pre>"; Print_r($arr); Echo"</pre>"; Echo"; foreach($arr[' Tmp_name '] as $key=$value) {        /*Echo $key, $value, "<br>"; Die;*/        //build temporary file//$filename = $_files[' upload ' [' tmp_name ']; Build the target file            if($arr[' Size '] [$key] >2*1024*1024){                 die(' No '); }            $path= './upload '; //gets a unique ID with a prefix, based on the current time microseconds.             $destination=$path.‘ /‘.uniqid(' Itcast '). jpg; //move uploaded file to new location, return boolean//move_uploaded_file (filename, destination)//move_uploaded_file (temporary file, custom destination file )            if(!Move_uploaded_file($value,$destination)){                 die(' Upload failed! ')); }    }    } Else {    //If you visit this page directly    Echo"<script>alert (' illegal uploading '); location.href= ' index.php ' </script>";}?>

PHP Core Programming-File upload (including multi-file upload)

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