Bring placeholders inline with building block content

This change makes the PHP code hold the same placeholder variables as are described in the building block examples, and match the building block spec documents.

Author: lornajane

voice/earmuff-a-call/index.php

@@ -5,6 +5,6 @@
 $keypair = new \Nexmo\Client\Credentials\Keypair(file_get_contents(NEXMO_APPLICATION_PRIVATE_KEY_PATH), NEXMO_APPLICATION_ID);
 $client = new \Nexmo\Client($keypair);
 
-$client->calls[NEXMO_CALL_UUID]->put(new \Nexmo\Call\Earmuff());
+$client->calls[UUID]->put(new \Nexmo\Call\Earmuff());
 sleep(3);
-$client->calls[NEXMO_CALL_UUID]->put(new \Nexmo\Call\Unearmuff());
+$client->calls[UUID]->put(new \Nexmo\Call\Unearmuff());

voice/mute-a-call/index.php

@@ -5,6 +5,6 @@
 $keypair = new \Nexmo\Client\Credentials\Keypair(file_get_contents(NEXMO_APPLICATION_PRIVATE_KEY_PATH), NEXMO_APPLICATION_ID);
 $client = new \Nexmo\Client($keypair);
 
-$client->calls[NEXMO_CALL_UUID]->put(new \Nexmo\Call\Mute());
+$client->calls[UUID]->put(new \Nexmo\Call\Mute());
 sleep(3);
-$client->calls[NEXMO_CALL_UUID]->put(new \Nexmo\Call\Unmute());
+$client->calls[UUID]->put(new \Nexmo\Call\Unmute());

voice/play-audio-stream-in-to-call/index.php

@@ -5,6 +5,6 @@
 $keypair = new \Nexmo\Client\Credentials\Keypair(file_get_contents(NEXMO_APPLICATION_PRIVATE_KEY_PATH), NEXMO_APPLICATION_ID);
 $client = new \Nexmo\Client($keypair);
 
-$stream = $client->calls[NEXMO_CALL_UUID]->stream();
+$stream = $client->calls[UUID]->stream();
 $stream->setUrl('https://nexmo-community.github.io/ncco-examples/assets/voice_api_audio_streaming.mp3');
 $stream->put();

voice/play-dtmf-in-to-call/index.php

@@ -5,6 +5,6 @@
 $keypair = new \Nexmo\Client\Credentials\Keypair(file_get_contents(NEXMO_APPLICATION_PRIVATE_KEY_PATH), NEXMO_APPLICATION_ID);
 $client = new \Nexmo\Client($keypair);
 
-$dtmf = $client->calls[NEXMO_CALL_UUID]->dtmf();
+$dtmf = $client->calls[UUID]->dtmf();
 $dtmf->setDigits('2468#');
 $dtmf->put();

voice/play-tts-in-to-call/index.php

@@ -5,7 +5,7 @@
 $keypair = new \Nexmo\Client\Credentials\Keypair(file_get_contents(NEXMO_APPLICATION_PRIVATE_KEY_PATH), NEXMO_APPLICATION_ID);
 $client = new \Nexmo\Client($keypair);
 
-$talk = $client->calls[NEXMO_CALL_UUID]->talk();
+$talk = $client->calls[UUID]->talk();
 $talk->setText(TEXT);
 $talk->setVoiceName('Kimberly');
 $talk->put();

voice/transfer-a-call/index.php

@@ -5,4 +5,4 @@
 $keypair = new \Nexmo\Client\Credentials\Keypair(file_get_contents(NEXMO_APPLICATION_PRIVATE_KEY_PATH), NEXMO_APPLICATION_ID);
 $client = new \Nexmo\Client($keypair);
 
-$client->calls[NEXMO_CALL_UUID]->put(new \Nexmo\Call\Transfer("https://developer.nexmo.com/ncco/transfer.json"));
+$client->calls[UUID]->put(new \Nexmo\Call\Transfer("https://developer.nexmo.com/ncco/transfer.json"));