upload acceptable file type only php

Question

I am doing a form that upload multiple images, how do I code such that files that are only 'jpg', 'png', 'gif' will be uploaded successfully and will skip those unacceptable files (eg. doc)? Currently my codes only allow upload if all files are accepted types and will prompt error even if there's only one file that is not acceptable file type

if ($source_type === NULL) {
    echo '<h3>Error</h3><br/>';
    echo 'Invalid file type<br/><br/>';
    echo '<input type="submit" style="color:#000000" onClick="history.go(-1);return true;" value="Back"><br/><br/>';
}
switch ($source_type) {
    case IMAGETYPE_GIF:
        $source_gd_image = imagecreatefromgif($source_file_path);
        break;
    case IMAGETYPE_JPEG:
        $source_gd_image = imagecreatefromjpeg($source_file_path);
        break;
    case IMAGETYPE_PNG:
        $source_gd_image = imagecreatefrompng($source_file_path);
        break;
    default:
        return false;
}

Sree · Accepted Answer · 2016-01-22 07:30:11Z

1

You can use in_array().

$source_type_allowd = array(IMAGETYPE_PNG, IMAGETYPE_JPEG, IMAGETYPE_GIF);
$source_type        = exif_imagetype($_FILES['file_upload']['tmp_name']);
$error              = !in_array($source_type, $source_type_allowd);// error

exif_imagetype — Determine the type of an image.

Othe option:-

    $mime_type = $_FILES['file_upload']['type'];

    $allowed = array("image/jpeg", "image/gif", "image/png");
    if(!in_array($mime_type, $allowed)) {
      $msg = 'Only jpg, jpeg, and png files are allowed.';
    }else{
      // Upload process
    }

answered Jan 22, 2016 at 7:30

Sree

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Comments

Birendra Gurung · Accepted Answer · 2016-01-22 08:22:01Z

0

You can use preg_match() function like this:

$filename = $_FILES['upload_file']['name'];
if(preg_match("/\.(gif|png|jpg)$/", $filename)){
   //file is gif/png/jpg
}
else{
   //invalid file format
   echo 'File should be gif|png|jpg';
}

answered Jan 22, 2016 at 8:22

Birendra Gurung

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