Added pg_escape_*() test

ext/pgsql/tests/08escape.phpt

@@ -0,0 +1,10 @@
+--TEST--
+PostgreSQL escape functions
+--SKIPIF--
+<?php include("skipif.inc"); ?>
+--FILE--
+<?php
+include("escape.inc");
+?>
+--EXPECT--
+OK

ext/pgsql/tests/escape.inc

@@ -0,0 +1,28 @@
+<?php
+$before = "ABC\\ABC";
+$expect  = "ABC\\\\ABC";
+$after = pg_escape_string($before);
+if ($expect === $after) {
+	echo "pg_escpae_string() is Ok\n";
+}
+else {
+	echo "pg_escpae_string() is NOT Ok\n";
+	var_dump($before);
+	var_dump($after);
+	var_dump($expect);
+}
+
+$before = "ABC\\ABC";
+$expect  = "ABC\\\\\\\\ABC";
+$after  = pg_escape_bytea($before);
+if ($expect === $after) {
+	echo "pg_escpae_byte() is Ok\n";
+}
+else {
+	echo "pg_escpae_byte() is NOT Ok\n";
+	var_dump($before);
+	var_dump($after);
+	var_dump($expect);
+}
+
+?>