From 8112d1beba1b60e47f61607fe5d44646b31cf10c Mon Sep 17 00:00:00 2001
From: Andrei Zmievski <andrei@php.net>
Date: Wed, 9 May 2001 20:06:39 +0000
Subject: [PATCH] @- Added is_callable() function that can be used to find out
 whether @  its argument is a valid callable construct. (Andrei)

---
 ext/standard/basic_functions.c | 31 +++++++++++++++++++++++++++++++
 ext/standard/basic_functions.h |  1 +
 2 files changed, 32 insertions(+)

diff --git a/ext/standard/basic_functions.c b/ext/standard/basic_functions.c
index 5374c24843..41c2d403f9 100644
--- a/ext/standard/basic_functions.c
+++ b/ext/standard/basic_functions.c
@@ -336,6 +336,7 @@ function_entry basic_functions[] = {
 	PHP_FE(is_array,								first_arg_allow_ref)
 	PHP_FE(is_object,								first_arg_allow_ref)
     PHP_FE(is_scalar,                               NULL)
+	PHP_FE(is_callable,								third_argument_force_ref)
 
 	PHP_FE(error_log,								NULL)
 	PHP_FE(call_user_func,							NULL)
@@ -2628,6 +2629,36 @@ PHP_FUNCTION(parse_ini_file)
 /* }}} */
 
 
+/* {{{ proto bool is_callable(mixed var [, bool syntax_only [, string callable_name ]]) */
+PHP_FUNCTION(is_callable)
+{
+	zval **var, **syntax_only, **callable_name;
+	char *name;
+	zend_bool retval;
+	zend_bool syntax = 0;
+
+	if (ZEND_NUM_ARGS() < 1 || ZEND_NUM_ARGS() > 3 ||
+		zend_get_parameters_ex(ZEND_NUM_ARGS(), &var, &syntax_only, &callable_name) == FAILURE) {
+		WRONG_PARAM_COUNT;
+	}
+
+	if (ZEND_NUM_ARGS() > 1) {
+		convert_to_boolean_ex(syntax_only);
+		syntax = Z_BVAL_PP(syntax_only);
+	}
+
+	if (ZEND_NUM_ARGS() > 2) {
+		retval = zend_is_callable(*var, syntax, &name);
+		zval_dtor(*callable_name);
+		ZVAL_STRING(*callable_name, name, 0);
+	} else
+		retval = zend_is_callable(*var, syntax, NULL);
+
+	RETURN_BOOL(retval);
+}
+/* }}} */
+
+
 /*
  * Local variables:
  * tab-width: 4
diff --git a/ext/standard/basic_functions.h b/ext/standard/basic_functions.h
index 381ab04969..86e7756c74 100644
--- a/ext/standard/basic_functions.h
+++ b/ext/standard/basic_functions.h
@@ -77,6 +77,7 @@ PHP_FUNCTION(is_string);
 PHP_FUNCTION(is_array);
 PHP_FUNCTION(is_object);
 PHP_FUNCTION(is_scalar);
+PHP_FUNCTION(is_callable);
 
 PHP_FUNCTION(error_log);
 
-- 
2.40.0