- json_decode: documentation ( source)
<?php
$json = '{"parse":{"title":"List of Arrow episodes", "pageid":37371793, "text":{"*":"<div class=\"mw-parser-output\"><h3><span id=\"Season_7_.282018.E2.80.9319.29\"></span><span class=\"mw-headline\" id=\"Season_7_(2018\u201319)\">Season 7 (2018\u201319)</span><span class=\"mw-editsection\"><span class=\"mw-editsection-bracket\">[</span><a href=\"/w/index.php?title=List_of"}}}';
$obj = json_decode($json);
echo $obj->parse->text->{'*'};