<?php $j=[ ['type' => ['href' => 'http://foo.bar']], ['embedded' => [['type' => ['href' => 'http://foo.bar']]] ]]; array_walk_recursive($j, function(&$v, $k) { if ($k == 'type') { $v['href'] = str_replace('foo', 'foz', $v['href']); } }); print_r($j);
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