Add ECHO.

Covered by unit test; fixes GitHub issue phpredis#165.

Author: nicolasff

php_redis.h

@@ -29,6 +29,7 @@ PHP_METHOD(Redis, connect);
 PHP_METHOD(Redis, pconnect);
 PHP_METHOD(Redis, close);
 PHP_METHOD(Redis, ping);
+PHP_METHOD(Redis, echo);
 PHP_METHOD(Redis, get);
 PHP_METHOD(Redis, set);
 PHP_METHOD(Redis, setex);

redis.c

@@ -76,6 +76,7 @@ static zend_function_entry redis_functions[] = {
      PHP_ME(Redis, pconnect, NULL, ZEND_ACC_PUBLIC)
      PHP_ME(Redis, close, NULL, ZEND_ACC_PUBLIC)
      PHP_ME(Redis, ping, NULL, ZEND_ACC_PUBLIC)
+     PHP_ME(Redis, echo, NULL, ZEND_ACC_PUBLIC)
      PHP_ME(Redis, get, NULL, ZEND_ACC_PUBLIC)
      PHP_ME(Redis, set, NULL, ZEND_ACC_PUBLIC)
      PHP_ME(Redis, setex, NULL, ZEND_ACC_PUBLIC)
@@ -778,6 +779,39 @@ PHP_METHOD(Redis, randomKey)
 }
 /* }}} */
 
+/* {{{ proto string Redis::echo(string key)
+ */
+PHP_METHOD(Redis, echo)
+{
+    zval *object;
+    RedisSock *redis_sock;
+    char *key = NULL, *cmd;
+    int key_len, cmd_len;
+	int key_free;
+
+    if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Os",
+                                     &object, redis_ce,
+                                     &key, &key_len) == FAILURE) {
+        RETURN_FALSE;
+    }
+
+    if (redis_sock_get(object, &redis_sock TSRMLS_CC) < 0) {
+        RETURN_FALSE;
+    }
+
+	key_free = redis_key_prefix(redis_sock, &key, &key_len TSRMLS_CC);
+    cmd_len = redis_cmd_format_static(&cmd, "ECHO", "s", key, key_len);
+	if(key_free) efree(key);
+
+	REDIS_PROCESS_REQUEST(redis_sock, cmd, cmd_len);
+    IF_ATOMIC() {
+	  redis_string_response(INTERNAL_FUNCTION_PARAM_PASSTHRU, redis_sock, NULL, NULL);
+    }
+    REDIS_PROCESS_RESPONSE(redis_string_response);
+
+}
+/* }}} */
+
 /* {{{ proto string Redis::renameKey(string key_src, string key_dst)
  */
 PHP_METHOD(Redis, renameKey)

tests/TestRedis.php

@@ -115,6 +115,12 @@ public function test1000() {
 	 $this->assertEquals($s, $this->redis->get('x'));
     }
 
+	public function testEcho() {
+		$this->assertEquals($this->redis->echo("hello"), "hello");
+		$this->assertEquals($this->redis->echo(""), "");
+		$this->assertEquals($this->redis->echo(" 0123 "), " 0123 ");
+	}
+
     public function testErr() {
 
 	 $this->redis->set('x', '-ERR');