code-boxx/0-PHP-CONVERT-IMG.MD

## 0-PHP-CONVERT-IMG.MD

      
    Raw
  

              0-PHP-CONVERT-IMG.MD
            
          
    CONVERT IMAGE FILE FORMAT IN PHP


https://code-boxx.com/convert-image-format-php/
https://youtu.be/PXvRJ3hPmIM

NOTES

Please make sure that extension = gd is enabled in php.ini.
USE THESE IMAGES FOR TESTING IF YOU WANT


LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-single.php
<?php
// (A) IMAGE CONVERT FUNCTION
function imgcon ($from, $to, $quality=null) {
  // (A1) CHECK VALID IMAGE TYPE
  $extf = strtolower(pathinfo($from, PATHINFO_EXTENSION));
  $extt = strtolower(pathinfo($to, PATHINFO_EXTENSION));
  $valid = ["bmp", "jpg", "jpeg", "png", "gif", "webp"];
  if (!in_array($extf, $valid) || !in_array($extt, $valid)) { return false; }

  // (A2) PROCESS CONVERSION
  if ($extf=="jpg") { $extf = "jpeg"; }
  if ($extt=="jpg") { $extt = "jpeg"; }
  $fnf = "imagecreatefrom$extf";
  $fnt = "image$extt";
  $img = $fnf($from);
  imagepalettetotruecolor($img);
  if ($quality !== null) { $fnt($img, $to, $quality); } else { $fnt($img, $to); }
  imagedestroy($img);
  // unlink($from); // delete source image if you want
  return true;
}

// (B) GO!
echo imgcon("ONE.jpg", "DEMO.webp") ? "OK" : "ERROR" ;

## 2-mass.php
<?php
// (A) SETTINGS
$cdir = __DIR__ . DIRECTORY_SEPARATOR; // convert all images in this folder
$cto = "webp"; // convert to this format
$cqy = null; // convert quality, null to use default

// (B) CONVERT IMAGE FILES
$clist = array_diff(["bmp", "jpg", "jpeg", "png", "gif", "webp"], [$cto]);
$clist = "$cdir*.{" . implode(",", $clist) . "}";
foreach (glob($clist, GLOB_BRACE) as $file) {
  // (B1) "SAVE AS" FILE NAME
  $saveas = $cdir . pathinfo($file, PATHINFO_FILENAME) . ".$cto";
  if (file_exists($saveas)) { continue; } // do not overwrite

  // (B2) PROCESS CONVERSION
  $extf = strtolower(pathinfo($file, PATHINFO_EXTENSION));
  if ($extf=="jpg") { $extf = "jpeg"; }
  $extt = $cto=="jpg" ? "jpeg" : $cto ;
  $fnf = "imagecreatefrom$extf";
  $fnt = "image$extt";
  $img = $fnf($file);
  imagepalettetotruecolor($img);
  if ($cqy !== null) { $fnt($img, $saveas, $cqy); }
  else { $fnt($img, $saveas); }
  imagedestroy($img);
  // unlink($file); // delete source image if you want
  echo "$saveas - OK";
}

## 3a-upload.html
<!DOCTYPE html>
<html>
  <head>
    <title>Upload Convert Image Demo</title>
    <meta charset="utf-8">
  </head>
  <body>
    <form action="3b-upload.php" enctype="multipart/form-data" method="post" target="_blank">
      <input type="file" name="up" required accept=".bmp,.jpg,.jpeg,.png,.gif,.webp">
      <input type="submit" value="Upload">
    </form>
  </body>
</html>

## 3b-upload.php
<?php
// (A) SETTINGS
$cdir = __DIR__ . DIRECTORY_SEPARATOR; // save to this directory
$cto = "webp"; // convert to this format
$cqy = null; // convert quality, null to use default

// (B) CHECK UPLOADED FILE
$ext = strtolower(pathinfo($_FILES["up"]["name"], PATHINFO_EXTENSION));
if (!in_array($ext, ["bmp", "jpg", "jpeg", "png", "gif", "webp"])) { exit("INVALID IMAGE"); }

// (C) MOVE UPLOADED FILE
$saveto = $cdir . $_FILES["up"]["name"];
move_uploaded_file($_FILES["up"]["tmp_name"], $saveto);

// (D) CONVERT IF NEEDED
if ($ext != $cto) {
  $extf = $ext=="jpg" ? "jpeg" : $ext ;
  $extt = $cto=="jpg" ? "jpeg" : $cto ;
  $saveas = $cdir . pathinfo($saveto, PATHINFO_FILENAME) . ".$cto";
  $fnf = "imagecreatefrom$extf";
  $fnt = "image$extt";
  $img = $fnf($saveto);
  imagepalettetotruecolor($img);
  if ($cqy !== null) { $fnt($img, $saveas, $cqy); }
  else { $fnt($img, $saveas); }
  imagedestroy($img);
  // unlink($saveto); // delete source image if you want
}

// (E) WHAT'S NEXT?
// REDIRECT TO ANOTHER PAGE?
// SHOW AN "UPLOAD OK PAGE"?
// SIMPLE MESSAGE?
echo "OK";
	<?php
	// (A) IMAGE CONVERT FUNCTION
	function imgcon ($from, $to, $quality=null) {
	// (A1) CHECK VALID IMAGE TYPE
	$extf = strtolower(pathinfo($from, PATHINFO_EXTENSION));
	$extt = strtolower(pathinfo($to, PATHINFO_EXTENSION));
	$valid = ["bmp", "jpg", "jpeg", "png", "gif", "webp"];
	if (!in_array($extf, $valid) \|\| !in_array($extt, $valid)) { return false; }

	// (A2) PROCESS CONVERSION
	if ($extf=="jpg") { $extf = "jpeg"; }
	if ($extt=="jpg") { $extt = "jpeg"; }
	$fnf = "imagecreatefrom$extf";
	$fnt = "image$extt";
	$img = $fnf($from);
	imagepalettetotruecolor($img);
	if ($quality !== null) { $fnt($img, $to, $quality); } else { $fnt($img, $to); }
	imagedestroy($img);
	// unlink($from); // delete source image if you want
	return true;
	}

	// (B) GO!
	echo imgcon("ONE.jpg", "DEMO.webp") ? "OK" : "ERROR" ;
	<?php
	// (A) SETTINGS
	$cdir = __DIR__ . DIRECTORY_SEPARATOR; // convert all images in this folder
	$cto = "webp"; // convert to this format
	$cqy = null; // convert quality, null to use default

	// (B) CONVERT IMAGE FILES
	$clist = array_diff(["bmp", "jpg", "jpeg", "png", "gif", "webp"], [$cto]);
	$clist = "$cdir*.{" . implode(",", $clist) . "}";
	foreach (glob($clist, GLOB_BRACE) as $file) {
	// (B1) "SAVE AS" FILE NAME
	$saveas = $cdir . pathinfo($file, PATHINFO_FILENAME) . ".$cto";
	if (file_exists($saveas)) { continue; } // do not overwrite

	// (B2) PROCESS CONVERSION
	$extf = strtolower(pathinfo($file, PATHINFO_EXTENSION));
	if ($extf=="jpg") { $extf = "jpeg"; }
	$extt = $cto=="jpg" ? "jpeg" : $cto ;
	$fnf = "imagecreatefrom$extf";
	$fnt = "image$extt";
	$img = $fnf($file);
	imagepalettetotruecolor($img);
	if ($cqy !== null) { $fnt($img, $saveas, $cqy); }
	else { $fnt($img, $saveas); }
	imagedestroy($img);
	// unlink($file); // delete source image if you want
	echo "$saveas - OK";
	}
	<!DOCTYPE html>
	<html>
	<head>
	<title>Upload Convert Image Demo</title>
	<meta charset="utf-8">
	</head>
	<body>
	<form action="3b-upload.php" enctype="multipart/form-data" method="post" target="_blank">
	<input type="file" name="up" required accept=".bmp,.jpg,.jpeg,.png,.gif,.webp">
	<input type="submit" value="Upload">
	</form>
	</body>
	</html>