gppa-lmt-extract-first-character.php: Added new snippet. (#898)

* `gppa-lmt-extract-first-character.php`: Added new snippet.

* `gppa-lmt-extract-first-character.php`: Fixed PHPCS issues.

gp-populate-anything/gppa-lmt-extract-first-character.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * Gravity Perks // Populate Anything // Extract First Character From Live Merge Tag
+ * https://gravitywiz.com/documentation/gravity-forms-populate-anything/
+ *
+ * Extract the first character of a string using when a Live Merge Tag.
+ * This is useful when you need the first letter of a name, for example.
+ */
+// Update "123" to your form ID; and "4" to the field ID you are copying from.
+add_filter( 'gppa_live_merge_tag_value_123_4', function( $value ) {
+	return substr( $value, 0, 1 );
+} );