/**
* Fetch JPEG or PNG or GIF Image
*
* A custom function in PHP which lets you fetch jpeg or png images from remote server to your local server
* Can also prevent duplicate by appending an increasing _xxxx to the filename. You can also overwrite it.
*
* Also gives a debug mode to check where the problem is, if this is not working for you.
*
* @author Swashata <swashata ~[at]~ intechgrity ~[dot]~ com>
* @copyright Do what ever you wish - I like GPL <img src="http://www.intechgrity.com/wp-includes/images/smilies/icon_smile.gif?84cd58" alt=":)" class="wp-smiley"> (& love tux <img src="http://www.intechgrity.com/wp-includes/images/smilies/icon_wink.gif?84cd58" alt=";)" class="wp-smiley"> )
* @link http://www.intechgrity.com/?p=808
*
* @param string $img_url The URL of the image. Should start with http or https followed by :// and end with .png or .jpeg or .jpg or .gif. Else it will not pass the validation
* @param string $store_dir The directory where you would like to store the images.
* @param string $store_dir_type The path type of the directory. 'relative' for the location in relation with the executing script location or 'absolute'
* @param bool $overwrite Set to true to overwrite, false to create a new image with different name
* @param bool|int $pref internally used to prefix the extension in case of duplicate file name. Used by the trailing recursion call
* @param bool $debug Set to true for enable debugging and print some useful messages.
* @return string the location of the image (either relative with the current script or abosule depending on $store_dir_type)
*/
public static function fetch_image($img_url, $store_dir = 'image', $store_dir_type = 'relative', $overwrite = false, $pref = false, $debug = false)
{
//first get the base name of the image
$i_name = explode('.', basename($img_url));
$i_name = $i_name[0];
//now try to guess the image type from the given url
//it should end with a valid extension...
//good for security too
if (preg_match('/(http|https)?:\\/\\/.*\\.png$/i', strtolower($img_url))) {
$img_type = 'png';
} else {
if (preg_match('/(http|https)?:\\/\\/.*\\.(jpg|jpeg)$/i', strtolower($img_url))) {
$img_type = 'jpg';
} else {
if (preg_match('/(http|https)?:\\/\\/.*\\.gif$/i', strtolower($img_url))) {
$img_type = 'gif';
} else {
if (true == $debug) {
echo 'Invalid image URL';
}
return '';
//possible error on the image URL
}
}
}
$dir_name = ($store_dir_type == 'relative' ? './' : '') . rtrim($store_dir, '/') . '/';
//create the directory if not present
if (!file_exists($dir_name)) {
mkdir($dir_name, 0777, true);
}
//calculate the destination image path
$i_dest = $dir_name . $i_name . ($pref === false ? '' : '_' . $pref) . '.' . $img_type;
//lets see if the path exists already
if (file_exists($i_dest)) {
$pref = (int) $pref;
//modify the file name, do not overwrite
if (false == $overwrite) {
return CjBlogHelper::fetch_image($img_url, $store_dir, $store_dir_type, $overwrite, ++$pref, $debug);
} else {
unlink($i_dest);
}
}
//first check if the image is fetchable
$img_info = @getimagesize($img_url);
//is it a valid image?
if (false == $img_info || !isset($img_info[2]) || !($img_info[2] == IMAGETYPE_JPEG || $img_info[2] == IMAGETYPE_PNG || $img_info[2] == IMAGETYPE_JPEG2000 || $img_info[2] == IMAGETYPE_GIF)) {
if (true == $debug) {
echo 'The image doesn\'t seem to exist in the remote server. Image: ' . $img_url . '| Image info: ' . print_r($img_info, true);
}
// jexit();
return '';
//return empty string
}
//now try to create the image
if ($img_type == 'jpg') {
$m_img = @imagecreatefromjpeg($img_url);
} else {
if ($img_type == 'png') {
$m_img = @imagecreatefrompng($img_url);
@imagealphablending($m_img, false);
@imagesavealpha($m_img, true);
} else {
if ($img_type == 'gif') {
$m_img = @imagecreatefromgif($img_url);
} else {
$m_img = FALSE;
}
}
}
//was the attempt successful?
if (FALSE === $m_img) {
if (true == $debug) {
echo 'Can not create image from the URL';
}
return '';
}
//now attempt to save the file on local server
if ($img_type == 'jpg') {
if (imagejpeg($m_img, $i_dest, 100)) {
return $i_dest;
} else {
return '';
}
} else {
if ($img_type == 'png') {
if (imagepng($m_img, $i_dest, 0)) {
return $i_dest;
} else {
return '';
}
} else {
if ($img_type == 'gif') {
if (imagegif($m_img, $i_dest)) {
return $i_dest;
} else {
return '';
}
}
}
}
return '';
}
