- print_r: documentation ( source)
- preg_match_all: documentation ( source)
<?php
$answer='</li><li><i class="icon-key"></i><input type="password" id="password" name="password" required="required" placeholder="password" autocomplete="off" /></li></ul><div class="actions"><input type="hidden" id="_token" name="_token" value="91fa9e869fb71902cc367523c212755e043b3ab3" />';
$pattern2 = '~name=\"_token\" value=\"([^"]+)~';
preg_match_all($pattern2,$answer,$result);
echo "<pre>";
print_r($result);
echo "</pre>";