wp_get_attachment() resize mod needed WordPress

Victor Teixeira comments:

Of course this line
$imagem = vt_resize( $attachment->ID,'' , 110, 90 );

Should be
$imagem = vt_resize( $attachment->ID,'' , 800, 550 );

For the size you want.

Victor Teixeira comments:

Just made another fix. The full code on the template should be:


<?php
foreach ( $attachments as $attachment ) :
$image = vt_resize( $attachment->ID,'' , 800, 550 );
$thumb = vt_resize( $attachment->ID,'' , 150, 120 );
?>
<li>
<a href="<?php echo $image[url]; ?>" class="thumb" title="<?php echo $attachment->post_title; ?>"><img src="<?php echo $thumb[url]; ?>" width="<?php echo $thumb[width]; ?>" height="<?php echo $thumb[height]; ?>" />
<div class="caption"><?php echo $attachment->post_title; ?></div>
</a>
</li>
<?php endforeach; ?>



Of course you can edit the sizes on the $image and $thumb variables.

shawn comments:

This function is working perfectly!

One last question before I select it as the winner...

my thumbnails are resizing proportionally as I'm guessing they should.. however, I would like to force them into a width/height if possible with this function so they look uniform on the bottom.

is this possible?

http://shawn.theanointedone.com/photogallery/tiltshift-gallery-7/


very very nice script!

shawn comments:

sorry one final question...

Is it possible to have a 'quality control' during the resize so that I can force the resized image to have a lower quality like photoshop does?

my woo_image() function does that where I say woo_image(q='50'&width=x...)

As I can see users uploading a lot of pics to a gallery page, just doing whatever I can to manage the load time for end users

Victor Teixeira comments:

If you want to crop the images for them to fit an specific size just add ,true after the image sizes:


thumb = vt_resize( $attachment->ID,'' , 150, 120, true );


shawn comments:

Thank you, your an obvious winner with this one.

I read the code, no quality control built in, maybe a good idea for later?

either way, it works, thank you very much...

Victor Teixeira comments:

New function with jpeg quality support:


/*
* Redimensiona imagens dinamicamente utilizando funções nativas do wp
* Victor Teixeira
*
* php 5.2+
*
* Exemplo de uso:
*
* <?php
* $thumb = get_post_thumbnail_id();
* $image = vt_resize( $thumb,'' , 140, 110, true, 80 );
* ?>
* <img src="<?php echo $image[url]; ?>" width="<?php echo $image[width]; ?>" height="<?php echo $image[height]; ?>" />
*
* @param int $attach_id
* @param string $img_url
* @param int $width
* @param int $height
* @param bool $crop
* @return array
*/
function vt_resize( $attach_id = null, $img_url = null, $width, $height, $crop = false, $jpeg_quality = 90 ) {

// this is an attachment, so we have the ID
if ( $attach_id ) {

$image_src = wp_get_attachment_image_src( $attach_id, 'full' );
$file_path = get_attached_file( $attach_id );

// this is not an attachment, let's use the image url
} else if ( $img_url ) {

$file_path = parse_url( $img_url );
$file_path = ltrim( $file_path['path'], '/' );
//$file_path = rtrim( ABSPATH, '/' ).$file_path['path'];

$orig_size = getimagesize( $file_path );

$image_src[0] = $img_url;
$image_src[1] = $orig_size[0];
$image_src[2] = $orig_size[1];
}

$file_info = pathinfo( $file_path );
$extension = '.'. $file_info['extension'];

// the image path without the extension
$no_ext_path = $file_info['dirname'].'/'.$file_info['filename'];

$cropped_img_path = $no_ext_path.'-'.$width.'x'.$height.$extension;

// checking if the file size is larger than the target size
// if it is smaller or the same size, stop right here and return
if ( $image_src[1] > $width || $image_src[2] > $height ) {

// the file is larger, check if the resized version already exists (for $crop = true but will also work for $crop = false if the sizes match)
if ( file_exists( $cropped_img_path ) ) {

$cropped_img_url = str_replace( basename( $image_src[0] ), basename( $cropped_img_path ), $image_src[0] );

$vt_image = array (
'url' => $cropped_img_url,
'width' => $width,
'height' => $height
);

return $vt_image;
}

// $crop = false
if ( $crop == false ) {

// calculate the size proportionaly
$proportional_size = wp_constrain_dimensions( $image_src[1], $image_src[2], $width, $height );
$resized_img_path = $no_ext_path.'-'.$proportional_size[0].'x'.$proportional_size[1].$extension;

// checking if the file already exists
if ( file_exists( $resized_img_path ) ) {

$resized_img_url = str_replace( basename( $image_src[0] ), basename( $resized_img_path ), $image_src[0] );

$vt_image = array (
'url' => $resized_img_url,
'width' => $new_img_size[0],
'height' => $new_img_size[1]
);

return $vt_image;
}
}

// no cache files - let's finally resize it
$new_img_path = image_resize( $file_path, $width, $height, $crop, $jpeg_quality );
$new_img_size = getimagesize( $new_img_path );
$new_img = str_replace( basename( $image_src[0] ), basename( $new_img_path ), $image_src[0] );

// resized output
$vt_image = array (
'url' => $new_img,
'width' => $new_img_size[0],
'height' => $new_img_size[1]
);

return $vt_image;
}

// default output - without resizing
$vt_image = array (
'url' => $image_src[0],
'width' => $image_src[1],
'height' => $image_src[2]
);

return $vt_image;
}



Call it like this:


thumb = vt_resize( $attachment->ID,'' , 150, 120, true, 70 );


PS: not tested.