EDITED: You need to use javascript to achieve that.
<script language = "javascript">
var query = location.href.split('#');
var anchorValueSplit = query[1].split("https://stackoverflow.com/");
var anchorValue = anchorValueSplit[1];
alert(anchorValue);
</script>
EDIT:Another solution
<script language = "javascript">
if(location.href.indexOf("#") > 0) {
location.href = location.href.replace("#","?");
}
</script>
<?php
$param = array_keys($_GET);
$param = $param[0];
$breakParam = explode("https://stackoverflow.com/",$param);
echo $request = $breakParam[1];
?>
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solved PHP get method ajax url reading [closed]