> 24) return true;
}
}
return false;
}
/* ------------- main logic ------------- */
$gifData = null;
$fileExists = false;
$showPreview = false;
$finalName = '';
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['image_url'])) {
$url = filter_var(trim($_POST['image_url']), FILTER_VALIDATE_URL);
$inputName = trim($_POST['filename'] ?? '');
if (!$url) {
log_debug('❌ Invalid URL');
} else {
log_debug('📥 Downloading: ' . $url);
$imgBin = @file_get_contents($url);
if ($imgBin === false) {
log_debug('❌ Download failed');
} else {
// Check if URL ends with .gif (case insensitive)
$path = parse_url($url, PHP_URL_PATH);
$isGif = strtolower(pathinfo($path, PATHINFO_EXTENSION)) === 'gif';
if ($isGif) {
// Use downloaded GIF data directly without reprocessing
$gifData = $imgBin;
$base = $inputName ? pathinfo($inputName, PATHINFO_FILENAME)
: pathinfo($path, PATHINFO_FILENAME);
$finalName = $base . '.gif';
$showPreview = true;
log_debug('ℹ️ Input is GIF — skipping re-encoding.');
} else {
$src = @imagecreatefromstring($imgBin);
if (!$src) {
log_debug('❌ Unsupported/corrupt image');
} else {
$w = imagesx($src);
$h = imagesy($src);
$hasAlpha = has_transparency($src);
log_debug('🔍 Transparency: ' . ($hasAlpha ? 'yes' : 'no'));
/* create truecolor canvas & copy */
$tmp = imagecreatetruecolor($w, $h);
imagesavealpha($tmp, true);
$transCol = imagecolorallocatealpha($tmp, 0, 0, 0, 127);
imagefill($tmp, 0, 0, $transCol);
imagecopy($tmp, $src, 0, 0, 0, 0, $w, $h);
/* reduce to palette */
imagetruecolortopalette($tmp, true, 256);
if ($hasAlpha) {
$idxTrans = imagecolorclosestalpha($tmp, 0, 0, 0, 127);
imagecolortransparent($tmp, $idxTrans);
}
ob_start();
imagegif($tmp);
$gifData = ob_get_clean();
imagedestroy($src);
imagedestroy($tmp);
log_debug('✅ GIF ready (' . strlen($gifData) . ' bytes)');
$base = $inputName ? pathinfo($inputName, PATHINFO_FILENAME)
: pathinfo($path, PATHINFO_FILENAME);
$finalName = $base . '.gif';
$showPreview = true;
}
}
/* saving */
if ($gifData) {
$dir = __DIR__ . '/z_files/emojis/';
if (!is_dir($dir)) mkdir($dir, 0755, true);
$dest = $dir . $finalName;
$fileExists = file_exists($dest);
if (isset($_POST['save'])) {
if ($fileExists && !isset($_POST['overwrite'])) {
log_debug('⚠️ File exists—confirm overwrite.');
} else {
file_put_contents($dest, $gifData);
log_debug('💾 Saved to /z_files/emojis/' . $finalName);
}
}
}
}
}
}
?>
Image→GIF (transparent)
URL → Transparent GIF
Debug
Preview
?>)