Build a PHP Image Upload Application to Enable Working With Images On the Fly

Build a PHP Image Upload Application to Enable Working With Images On the Fly

Listening Video

Master PHP Image Processing with Adam Khoury in this Video Textbook Series. In this video we learn to build a basic PHP image file upload application so we have a way to work with images on the fly. Which means automatically at runtime upon upload of an image file.

Lesson Code

<!-- -------------------------------------------- -->

<!-- "my_file.php" that has the simple form on it -->
<!-- -------------------------------------------- -->

<form enctype="multipart/form-data" method="post" action="image_upload_script.php">
Choose your file here:
<input name="uploaded_file" type="file"/><br /><br />
<input type="submit" value="Upload It"/>
</form>

<!-- -------------------------------------------- -->
<!-- "image_upload_script.php" -->
<!-- -------------------------------------------- -->

<?php// Access the $_FILES global variable for this specific file being uploaded
// and create local PHP variables from the $_FILES array of information$fileName = $_FILES["uploaded_file"]["name"]; // The file name$fileTmpLoc = $_FILES["uploaded_file"]["tmp_name"]; // File in the PHP tmp folder$fileType = $_FILES["uploaded_file"]["type"]; // The type of file it is$fileSize = $_FILES["uploaded_file"]["size"]; // File size in bytes$fileErrorMsg = $_FILES["uploaded_file"]["error"]; // 0 = false | 1 = true$kaboom = explode(".", $fileName); // Split file name into an array using the dot$fileExt = end($kaboom); // Now target the last array element to get the file extension
// START PHP Image Upload Error Handling --------------------------------------------------if (!$fileTmpLoc) { // if file not chosen
    echo "ERROR: Please browse for a file before clicking the upload button.";
    exit();
} else if($fileSize > 5242880) { // if file size is larger than 5 Megabytes
    echo "ERROR: Your file was larger than 5 Megabytes in size.";
    unlink($fileTmpLoc); // Remove the uploaded file from the PHP temp folder
    exit();
} else if (!preg_match("/.(gif|jpg|png)$/i", $fileName) ) {
     // This condition is only if you wish to allow uploading of specific file types   
     echo "ERROR: Your image was not .gif, .jpg, or .png.";
     unlink($fileTmpLoc); // Remove the uploaded file from the PHP temp folder
     exit();
} else if ($fileErrorMsg == 1) { // if file upload error key is equal to 1
    echo "ERROR: An error occured while processing the file. Try again.";
    exit();
}// END PHP Image Upload Error Handling ----------------------------------------------------
// Place it into your "uploads" folder mow using the move_uploaded_file() function$moveResult = move_uploaded_file($fileTmpLoc, "uploads/$fileName");// Check to make sure the move result is true before continuingif ($moveResult != true) {
    echo "ERROR: File not uploaded. Try again.";
    unlink($fileTmpLoc); // Remove the uploaded file from the PHP temp folder
    exit();
}unlink($fileTmpLoc); // Remove the uploaded file from the PHP temp folder
// Display things to the page so you can see what is happening for testing purposesecho "The file named <strong>$fileName</strong> uploaded successfuly.<br /><br />";
echo "It is <strong>$fileSize</strong> bytes in size.<br /><br />";
echo "It is an <strong>$fileType</strong> type of file.<br /><br />";
echo "The file extension is <strong>$fileExt</strong><br /><br />";
echo "The Error Message output for this upload is: $fileErrorMsg";?>

 click here to code.

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