Viewing file:  image-resizer.php (5.17 KB) -rw-r--r--
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<?php
/*
* Resize images dynamically using wp built in functions
* Victor Teixeira
*
* php 5.2+
*
* Exemplo de uso:
*
* <?php
* $thumb = get_post_thumbnail_id();
* $image = vt_resize( $thumb, '', 140, 110, true);
* ?>
* <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 $crop
* @return array
*/
if(!function_exists('vt_resize')) :
function vt_resize($attach_id = null, $img_url = null, $width = null, $height = null, $crop = false) {
global $blog_id;
// check if the dimensions are greater than 0
if($width > 0 OR $height > 0) {
// this is an attachment, so we have the ID
if($attach_id) {
$image_src = wp_get_attachment_image_src( $attach_id, 'full');
$file_path = get_attached_file( $attach_id);
// this is not an attachment, let's use the image url
} elseif($img_url) {
if(!preg_match("/http:/", $img_url)) { $img_url = site_url().'/'.$img_url; }
$file_path = parse_url( $img_url);
$file_path = $_SERVER['DOCUMENT_ROOT'] . $file_path['path'];
if (!file_exists($file_path)) {
// simple fix for direct links to images on multi-site installs
if (isset($blog_id) && $blog_id > 0) {
// uploaded images to media folders
$imageParts = explode('/files/', $img_url, 2);
if (isset($imageParts[1])) {
$img_url = get_site_url(1) .'/wp-content/blogs.dir/'. $blog_id .'/files/'. $imageParts[1];
$file_path = parse_url( $img_url);
$file_path = $_SERVER['DOCUMENT_ROOT'] . $file_path['path'];
}
// if not found in media folders check theme folders
if (!file_exists($file_path)) {
// files in the theme folder
$imageParts = explode(THEME_URL, $img_url, 2);
if (isset($imageParts[1])) {
$file_path = THEME_DIR . $imageParts[1];
}
}
}
}
//$file_path = ltrim( $file_path['path'], '/');
//$file_path = rtrim( ABSPATH, '/').$file_path['path'];
if (file_exists($file_path)) {
$orig_size = getimagesize( $file_path);
$image_src[0] = $img_url;
$image_src[1] = $orig_size[0];
$image_src[2] = $orig_size[1];
} else {
// couldn't find the image so set the values back to what was provided and return
$vt_image = array (
'url' => $img_url,
'width' => $width,
'height' => $height
);
return $vt_image;
}
}
$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' => $proportional_size[0],
'height' => $proportional_size[1]
);
return $vt_image;
}
}
// no cache files - let's finally resize it
// .............................................................
// first, make sure the directory is writable.
if (is_writable($file_info['dirname'].'/')) {
// it's writable, let's do some resizing!
$new_img_path = wp_get_image_editor( $file_path, $width, $height, $crop, NULL, NULL, 100);
$new_img_size = getimagesize( $new_img_path);
$new_img = str_replace( basename( $image_src[0]), basename( $new_img_path), $image_src[0]);
} else {
// nope, directory isn't writable. return the original file info
$new_img_size[0] = $width;
$new_img_size[1] = $height;
$new_img = $img_url;
}
// set image data for 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;
}
}
endif; ?>
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