<?php

$str = '<s:Label x="10" y="10" text="NOME"/>
<s:TextInput id="NOME" x="10" y="21" width="290" tabIndex="1"/>
<s:Label x="10" y="50" text="TELEFONE"/>
<s:Label x="120" y="50" text="RAMAL"/>
<s:TextInput id="RAMAL" x="120" y="61" width="102" tabIndex="5"/>
<s:Label x="365" y="50" text="LOGIN"/>
<s:TextInput id="LOGIN1" x="365" y="61" width="102" tabIndex="7"/>
<s:TextInput id="TELEFONE" x="10" y="61" width="102" tabIndex="4"/>
<s:Label x="308" y="11" text="EMAIL"/>
<s:TextInput id="EMAIL" x="308" y="22" width="290" tabIndex="2"/>
<s:Label x="605" y="10" text="MATRICULA"/>
<s:TextInput id="MATRICULA" x="606" y="22" width="144"  tabIndex="3"/>
<s:Label x="627" y="91" text="NASCIMENTO"/>
<s:TextInput id="NASCIMENTO" x="627" y="103" width="121" tabIndex="14"/>';

preg_match_all('/id="(.+?)"/', $str, $matches);
var_dump($matches[1]);