i am a new user and want to learn how to create php application using ESL i just want to play a dynamic message using cepstral and get the customer response using dtmf. but i can't unserstand how to handle call using php as their is no mod_php is available like mod_lua, i park the call and now want to speak in the call but unable to do:

please guide me i can't solve that problem with playandgetdigits() example of Mr. Michael Collins that what is the code of [handler.php].

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originate user/1500 meeting_request_1500

Then create that extension:

<extension name="meeting request">
<condition field="destination_number" expression="^meeting_request_(\d+)$">
    <action application="set" data="target_user=$1"/>
    <action application="set" data="text=cepstral|callie|Hi, we have a meeting on Monday at 9, are you joining us, if yes then press, 1. and if not press, 2."/>
    <action application="answer"/>
    <action application="sleep" data="1000"/>
    <action application="play_and_get_digits"
      data="1 1 3 5000 # speak:${text} ivr/ivr-that_was_an_invalid_entry.wav answer \d"/>
    <action application="set" data="api_hangup_hook=system handler.php ${target_user} ${answer}"/>
    <action application="log" data="INFO User ${target_user} responded with ${answer}"/>
    <action application="playback" data="ivr/ivr-Thank_you.wav"/>
    <action application="hangup"/>
</condition>
</extension>

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is anyone guide me how to do it php,