how to get image source from an img tag using php function.
You can use PHP Simple HTML DOM Parser (http://simplehtmldom.sourceforge.net/)
// Create DOM from URL or file
$html = file_get_html('http://www.google.com/');
// Find all images
foreach($html->find('img') as $element) {
echo $element->src.'
';
}
// Find all links
foreach($html->find('a') as $element) {
echo $element->href.'
';
}