Add clearLastError

Author: nicolasff

README.markdown

@@ -2484,6 +2484,24 @@ $err = $redis->getLastError();
 // "ERR Error compiling script (new function): user_script:1: '=' expected near '-'"
 </pre>
 
+## clearLastError
+##### Description
+Clear the last error message  
+##### Parameters
+*none*  
+##### Return Value
+*BOOL* TRUE  
+##### Examples
+<pre>
+$redis->set('x', 'a');
+$redis->incr('x');
+$err = $redis->getLastError();
+// "ERR value is not an integer or out of range"
+$redis->clearLastError();
+$err = $redis->getLastError();
+// NULL
+</pre>
+
 ## _prefix
 ##### Description
 A utility method to prefix the value with the prefix setting for phpredis.

php_redis.h

@@ -139,6 +139,7 @@ PHP_METHOD(Redis, migrate);
 PHP_METHOD(Redis, time);
 
 PHP_METHOD(Redis, getLastError);
+PHP_METHOD(Redis, clearLastError);
 PHP_METHOD(Redis, _prefix);
 PHP_METHOD(Redis, _unserialize);
 

redis.c

@@ -219,6 +219,7 @@ static zend_function_entry redis_functions[] = {
      PHP_ME(Redis, migrate, NULL, ZEND_ACC_PUBLIC)
 
      PHP_ME(Redis, getLastError, NULL, ZEND_ACC_PUBLIC)
+     PHP_ME(Redis, clearLastError, NULL, ZEND_ACC_PUBLIC)
 
      PHP_ME(Redis, _prefix, NULL, ZEND_ACC_PUBLIC)
      PHP_ME(Redis, _unserialize, NULL, ZEND_ACC_PUBLIC)
@@ -6161,6 +6162,32 @@ PHP_METHOD(Redis, getLastError) {
 	}
 }
 
+/*
+ * {{{ proto Redis::clearLastError()
+ */
+PHP_METHOD(Redis, clearLastError) {
+	zval *object;
+	RedisSock *redis_sock;
+
+	// Grab our object
+	if(zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "O", &object, redis_ce) == FAILURE) {
+		RETURN_FALSE;
+	}
+	// Grab socket
+	if(redis_sock_get(object, &redis_sock TSRMLS_CC, 0) < 0) {
+		RETURN_FALSE;
+	}
+
+	// Clear error message
+	if(redis_sock->err) {
+		efree(redis_sock->err);
+	}
+	redis_sock->err = NULL;
+
+	RETURN_TRUE;
+}
+
+
 /*
  * {{{ proto Redis::time()
  */

tests/TestRedis.php

@@ -3032,6 +3032,10 @@ public function testGetLastError() {
 		$incrError = $this->redis->getLastError();
 		$this->assertTrue($incrError !== $evalError); // error has changed
 		$this->assertTrue(strlen($incrError) > 0);
+
+		// clear error
+		$this->redis->clearLastError();
+		$this->assertTrue($this->redis->getLastError() === NULL);
 	}
 
     // Helper function to compare nested results -- from the php.net array_diff page, I believe