Devo modificare uno script php in modo tale che mi applichi a delle foto un watermar semplicissimo, una semplice stringa di testo col nome del mio sito:
Codice PHP:
function imw_gen_image_post()
{
global $wpdb;
$_exif = function_exists('exif_read_data');
/* POST Actions */
if( $_REQUEST['postact'] == 'genpost' )
{
// GO!
$siteurl = get_settings('siteurl');
$num_perpage = intval($_REQUEST['num_perpage']);
$skip_resize = intval($_REQUEST['skip_resize']);
$base = str_replace("\\",'/', $_REQUEST['base_url']);
$path = str_replace("\\",'/', $_REQUEST['base_path']);
if( $path == '' )
{
$location = $PHP_SELF . "?page={$_REQUEST['page']}&msg=1";
header("Location: $location");
exit();
}
$append = $_REQUEST['append'];
$prepend = $_REQUEST['prepend'];
$path = str_replace(ABSPATH, '', trim($path));
$dir = ABSPATH . $path;
if($base == '' ) {
$base = trailingslashit($siteurl) . $path;
}
if ( '/' == substr($base, -1)) $base = substr($base, 0, -1);
if ( '/' == substr($dir, -1)) $dir = substr($dir, 0, -1);
if( !file_exists($dir) ) {
$location = $PHP_SELF . "?page={$_REQUEST['page']}&msg=2";
header("Location: $location");
exit();
}
$width = intval($_REQUEST['i_width']); //$width = $width ? $width : 640;
$height = intval($_REQUEST['i_height']); //$height = $height ? $height : 480
$html = '';
$n = 0;
$files = array();
if ($handle = opendir($dir)) {
while (false !== ($file = readdir($handle))) {
if ($file != "." && $file != "..") {
$files[] = $file;
}
}
closedir($handle);
}
sort($files, SORT_STRING);
if ( ! $skip_resize && ! wp_mkdir_p( "$dir/th" ) ) {
echo sprintf(__('Unable to create directory %s. Is its parent directory writable by the server?'), "$dir/th");
die();
}
foreach( $files as $file)
{
$img = "$dir/$file";
if( ! is_file($img) ) continue;
if( ($is = getimagesize($img)) === false ) continue;
if( $is[2] >= 1 && $is[2] <= 6 && $is[2] )
$fn = $file;
$bigmode = false;
if( ! $skip_resize && $is[2] != 4 ) {
$fn = 'th/' . strtolower(str_replace('.','_thumb.', $file));
iw_resize( $img, "$dir/$fn" , $width, $height);
watermark($img); <---------------------
$bigmode = true;
}
$prepend1 = str_replace('%file%', $file, $prepend);
$append1 = str_replace('%file%', $file, $append);
$prepend1 = str_replace('%width%', $is[0], $prepend1);
$append1 = str_replace('%width%', $is[0], $append1);
$prepend1 = str_replace('%height%', $is[1], $prepend1);
$append1 = str_replace('%height%', $is[1], $append1);
$prepend1 = str_replace('%url%', "{$base}/{$file}", $prepend1);
$append1 = str_replace('%url%', "{$base}/{$file}", $append1);
if($_exif) {
$exif_data = exif_read_data("$dir/$file", 0, true);
if( !( $exif_data === false ) )
{
$val2 = '';
foreach ($exif_data as $key => $section) {
foreach ($section as $name => $val) {
$k0 = strtolower($key);
$k1 = strtolower($name);
$val2 .= strtolower($key.'.'.$name)." = $val
";
$prepend1 = str_replace('%'.$k0.'.'.$k1.'%', $val, $prepend1);
$append1 = str_replace('%'.$k0.'.'.$k1.'%', $val, $append1);
}
}
$prepend1 = str_replace('%exif%', $val2, $prepend1);
$append1 = str_replace('%exif%', $val2, $append1);
}
}
if( $is[2] != 4 ) {
$is = getimagesize("$dir/$fn");
$params = " {$is[3]} vspace=\"4\" alt=\"{$file}\"";
$html .= $prepend1;
if( $bigmode ) $html .= "<a href=\"javascript:void(0)\" onclick=\"window.open(\'{$base}/{$file}\');\" >";
$html .= "<img src=\"{$base}/{$fn}\" $params />";
if( $bigmode ) $html .= "</a>";
$html .= $append1;
$n++;
}else{
}
// $n++;
if( $num_perpage && ($n%$num_perpage==0) ) {
$html .= "\n\n";
}
}
$_POST['comment_status'] = 'open';
$_POST['advanced_view'] = 1;
$_POST['post_category'] = array();
$_POST['post_status'] = $_REQUEST['post_type'];
$_POST['content'] = $html;
$_POST['post_title'] = $_POST['post_title'] ? $_POST['post_title'] : 'Image Wizard Draft';
$post_ID = write_post();
if( $post_ID ) {
$location = "post.php?action=edit&post=$post_ID";
}
else
{
$location = $PHP_SELF . "?page={$_REQUEST['page']}";
}
header("Location: $location");
exit();
}
/* END */
?>
In pratica fa questo si legge tutte le immagini in una cartella, e crea per ciascuna una miniatura, salvandola in un subdirectory della cartella madre tramite la funzione seguente:
Codice PHP:
function iw_resize($image_path, $target_path, $max_width, $max_height)
{
//echo "
Processing $image_path --> $target_path
";
# Load image
$img = null;
$ext = strtolower(end(explode('.', $image_path)));
if ($ext == 'jpg' || $ext == 'jpeg') {
$img = @imagecreatefromjpeg($image_path);
} else if ($ext == 'png') {
$img = @imagecreatefrompng($image_path);
# Only if your version of GD includes GIF support
} else if ($ext == 'gif') {
$img = @imagecreatefrompng($image_path);
}
# If an image was successfully loaded, test the image for size
if ($img) {
# Get image size and scale ratio
$width = imagesx($img);
$height = imagesy($img);
$scale = min($max_width/$width, $max_height/$height);
# If the image is larger than the max shrink it
if ($scale < 1) {
$new_width = floor($scale*$width);
$new_height = floor($scale*$height);
# Create a new temporary image
$tmp_img = imagecreatetruecolor($new_width, $new_height);
# Copy and resize old image into new image
//imagecopyresized imagecopyresampled
imagecopyresampled($tmp_img, $img, 0, 0, 0, 0,
$new_width, $new_height, $width, $height);
imagedestroy($img);
$img = $tmp_img;
}
}
# Create error image if necessary
if (!$img) {
$img = imagecreate($max_width, $max_height);
imagecolorallocate($img,0,0,0);
$c = imagecolorallocate($img,70,70,70);
imageline($img,0,0,$max_width,$max_height,$c2);
imageline($img,$max_width,0,0,$max_height,$c2);
}
# Save the image
imagejpeg($img, $target_path);
}
Bene allora ho detto mettiamo una funzione watermark($img) che applico a ciscuna delle immagini nel loop principale, (l'ho indicata in nero nel codice - vedi primo blocco)
La funzione, per quel poco che ne capisco di PHP l'ho scritta così:
Codice PHP:
function watermark($image_path)
{
echo "
Applicazione watermark $image_path
";
# Load image
$img = null;
$ext = strtolower(end(explode('.', $image_path)));
if ($ext == 'jpg' || $ext == 'jpeg') {
$img = @imagecreatefromjpeg($image_path);
} else if ($ext == 'png') {
$img = @imagecreatefrompng($image_path);
# Only if your version of GD includes GIF support
} else if ($ext == 'gif') {
$img = @imagecreatefrompng($image_path);
}
# If an image was successfully loaded, test the image for size
if ($img) {
# Get image size and scale ratio
//$larghezza = imagesx($img);
//$altezza = imagesy($img);
//$copyright = [url]www.miosito.com;[/url]
$tmp_img = $img;
$textcolor = imagecolorallocate($tmp_img, 255, 255, 255);
imagestring($tmp_img, 5, 6, 6, [url]www.miosito.com,[/url] $textcolor);
//$scale = min($max_width/$width, $max_height/$height);
imagedestroy($img);
$img = $tmp_img;
# If the image is larger than the max shrink it
/* if ($scale < 1) {
$new_width = floor($scale*$width);
$new_height = floor($scale*$height);
# Create a new temporary image
$tmp_img = imagecreatetruecolor($new_width, $new_height);
# Copy and resize old image into new image
//imagecopyresized imagecopyresampled
imagecopyresampled($tmp_img, $img, 0, 0, 0, 0,
$new_width, $new_height, $width, $height);
imagedestroy($img);
$img = $tmp_img;
}
*/
}
# Create error image if necessary
if (!$img) {
echo "
Errore nell'immagine sorgente
";
}
# Save the image
imagejpeg($img, $image_path, 75);
}
In pratica vorrei che: il programma si scorre le immagini, per ciascuna crea la miniatura e poi piglia l'iimagine originale, vi applica l'watermark ( una semplice stringa col nome del mio sito ) e sovrascrive il file originale. Solo questo.
L'errore che ricevo è il seguente, chiaramente l'watermark non me lo mette:
Codice PHP:
Warning: imagejpeg(): 101 is not a valid Image resource in /home/content/a/m/a/amaporn86/html/wp-content/plugins/imagewiz.php on line 422
Warning: Cannot modify header information - headers already sent by (output started at /home/content/a/m/a/amaporn86/html/wp-content/plugins/imagewiz.php:372) in /home/content/a/m/a/amaporn86/html/wp-content/plugins/imagewiz.php on line 194
Se qualcuno può aiutarmi.....
GRAZIE
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