code-boxx · August 6, 2023 09:29
diff --git a/0-PHP-CONVERT-IMG.MD b/0-PHP-CONVERT-IMG.MD
diff --git a/1-single.php b/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" ;
diff --git a/2-mass.php b/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";
 }
diff --git a/3a-upload.html b/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>
diff --git a/3b-upload.php b/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>