Find first image of post content in wordpress


Check below function for find out first image from content of post
function getPostFirstImg() {
global $post, $posts;
$first_img = ”;
$output = preg_match_all(‘/<img.+src=[\'”]([^\'”]+)[\'”].*>/i’, $post->post_content, $matches);

$first_img = $matches [1] [0];

if(empty($first_img)){ //Defines a default image
$first_img = 0;
}
return $first_img;
}

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