<?php
$html = <<< EOF
<script type="text/javascript">
window._wpemojiSettings = {"source":{"concatemoji":"http:\/\/domain.com\/wp-includes\/js\/wp-emoji-release.min.js?ver=4.2.4"}}; ........
</script>
EOF;
preg_match_all('/<script.*?(http.*?\.js(?:\?.*?)?)"/si', $html, $matches, PREG_PATTERN_ORDER
); for ($i = 0; $i < count($matches[1]); $i++) { }
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