diff --git a/ext/standard/basic_functions.c b/ext/standard/basic_functions.c
index e0b7760477d37..d15854f7ce038 100755
--- a/ext/standard/basic_functions.c
+++ b/ext/standard/basic_functions.c
@@ -173,6 +173,7 @@ static const zend_function_entry basic_functions[] = { /* {{{ */
 	PHP_FE(strtok,															arginfo_strtok)
 	PHP_FE(strtoupper,														arginfo_strtoupper)
 	PHP_FE(strtolower,														arginfo_strtolower)
+	PHP_FE(str_contains,													arginfo_str_contains)
 	PHP_FE(strpos,															arginfo_strpos)
 	PHP_FE(stripos,															arginfo_stripos)
 	PHP_FE(strrpos,															arginfo_strrpos)
diff --git a/ext/standard/basic_functions.stub.php b/ext/standard/basic_functions.stub.php
index 1e4cc22d00ec2..4bb713578698b 100755
--- a/ext/standard/basic_functions.stub.php
+++ b/ext/standard/basic_functions.stub.php
@@ -574,6 +574,8 @@ function stristr(string $haystack, string $needle, bool $before_needle = false):
 
 function strstr(string $haystack, string $needle, bool $before_needle = false): string|false {}
 
+function str_contains(string $haystack, string $needle): bool {}
+
 function strchr(string $haystack, string $needle, bool $before_needle = false): string|false {}
 
 function strpos(string $haystack, string $needle, int $offset = 0): int|false {}
diff --git a/ext/standard/basic_functions_arginfo.h b/ext/standard/basic_functions_arginfo.h
index e7ae2a5a384c4..7314aa4af3cb0 100755
--- a/ext/standard/basic_functions_arginfo.h
+++ b/ext/standard/basic_functions_arginfo.h
@@ -899,6 +899,11 @@ ZEND_END_ARG_INFO()
 
 #define arginfo_strstr arginfo_stristr
 
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_str_contains, 0, 2, _IS_BOOL, 0)
+	ZEND_ARG_TYPE_INFO(0, haystack, IS_STRING, 0)
+	ZEND_ARG_TYPE_INFO(0, needle, IS_STRING, 0)
+ZEND_END_ARG_INFO()
+
 #define arginfo_strchr arginfo_stristr
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_strpos, 0, 2, MAY_BE_LONG|MAY_BE_FALSE)
diff --git a/ext/standard/php_string.h b/ext/standard/php_string.h
index 7753bb6b46a79..9e94910bf3c18 100644
--- a/ext/standard/php_string.h
+++ b/ext/standard/php_string.h
@@ -39,6 +39,7 @@ PHP_FUNCTION(basename);
 PHP_FUNCTION(dirname);
 PHP_FUNCTION(pathinfo);
 PHP_FUNCTION(strstr);
+PHP_FUNCTION(str_contains);
 PHP_FUNCTION(strpos);
 PHP_FUNCTION(stripos);
 PHP_FUNCTION(strrpos);
diff --git a/ext/standard/string.c b/ext/standard/string.c
index 363117fce86a4..b242a44e0bcde 100644
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -1851,6 +1851,21 @@ PHP_FUNCTION(strstr)
 }
 /* }}} */
 
+/* {{{ proto bool str_contains(string haystack, string needle)
+   Checks if a string contains another */
+PHP_FUNCTION(str_contains)
+{
+	zend_string *haystack, *needle;
+
+	ZEND_PARSE_PARAMETERS_START(2, 2)
+		Z_PARAM_STR(haystack)
+		Z_PARAM_STR(needle)
+	ZEND_PARSE_PARAMETERS_END();
+
+	RETURN_BOOL(php_memnstr(ZSTR_VAL(haystack), ZSTR_VAL(needle), ZSTR_LEN(needle), ZSTR_VAL(haystack) + ZSTR_LEN(haystack)));
+}
+/* }}} */
+
 /* {{{ proto string strchr(string haystack, string needle)
    An alias for strstr */
 /* }}} */
diff --git a/ext/standard/tests/strings/str_contains.phpt b/ext/standard/tests/strings/str_contains.phpt
new file mode 100644
index 0000000000000..f54cd1c00c4b2
--- /dev/null
+++ b/ext/standard/tests/strings/str_contains.phpt
@@ -0,0 +1,34 @@
+--TEST--
+Test str_contains() function
+--FILE--
+<?php
+/* Prototype: str_contains ( string $haystack , string $needle ) : bool
+   Description: Check if a string contains another string
+   Source code: ext/standard/string.c
+*/
+var_dump(str_contains("test string", "test"));
+var_dump(str_contains("test string", "string"));
+var_dump(str_contains("test string", "strin"));
+var_dump(str_contains("test string", "t s"));
+var_dump(str_contains("test string", "g"));
+var_dump(str_contains("te".chr(0)."st", chr(0)));
+var_dump(str_contains("tEst", "test"));
+var_dump(str_contains("teSt", "test"));
+var_dump(str_contains("", ""));
+var_dump(str_contains("a", ""));
+var_dump(str_contains("", "a"));
+var_dump(str_contains("\\\\a", "\\a"));
+?>
+--EXPECT--
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(false)
+bool(false)
+bool(true)
+bool(true)
+bool(false)
+bool(true)