diff --git a/README.md b/README.md
index ade69773..c8602c8e 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,7 @@ Polyfills are provided for:
   introduced in PHP 7.4;
 - the `fdiv` function introduced in PHP 8.0;
 - the `preg_last_error_msg` function introduced in PHP 8.0;
+- the `str_contains` function introduced in PHP 8.0;
 - the `ValueError` class introduced in PHP 8.0;
 - the `FILTER_VALIDATE_BOOL` constant introduced in PHP 8.0;
 
diff --git a/src/Php80/Php80.php b/src/Php80/Php80.php
index 77cc230b..557ace2b 100644
--- a/src/Php80/Php80.php
+++ b/src/Php80/Php80.php
@@ -45,4 +45,9 @@ public static function preg_last_error_msg(): string
                 return 'Unknown error';
         }
     }
+
+    public static function str_contains(string $haystack, string $needle): bool
+    {
+        return '' === $needle || false !== strpos($haystack, $needle);
+    }
 }
diff --git a/src/Php80/README.md b/src/Php80/README.md
index c52acfbb..e569c113 100644
--- a/src/Php80/README.md
+++ b/src/Php80/README.md
@@ -8,6 +8,7 @@ This component provides features added to PHP 8.0 core:
 - `ValueError` class
 - `FILTER_VALIDATE_BOOL` constant
 - [`preg_last_error_msg`](https://php.net/preg_last_error_msg)
+- [`str_contains`](https://php.net/str_contains)
 
 More information can be found in the
 [main Polyfill README](https://github.com/symfony/polyfill/blob/master/README.md).
diff --git a/src/Php80/bootstrap.php b/src/Php80/bootstrap.php
index f239357b..6b1d27d9 100644
--- a/src/Php80/bootstrap.php
+++ b/src/Php80/bootstrap.php
@@ -20,6 +20,10 @@ function fdiv(float $dividend, float $divisor): float { return p\Php80::fdiv($di
         function preg_last_error_msg(): string { return p\Php80::preg_last_error_msg(); }
     }
 
+    if (!function_exists('str_contains')) {
+        function str_contains(string $haystack, string $needle): bool { return p\Php80::str_contains($haystack, $needle); }
+    }
+
     if (!defined('FILTER_VALIDATE_BOOL') && defined('FILTER_VALIDATE_BOOLEAN')) {
         define('FILTER_VALIDATE_BOOL', FILTER_VALIDATE_BOOLEAN);
     }
diff --git a/tests/Php80/Php80Test.php b/tests/Php80/Php80Test.php
index fab292cb..ba5233d3 100644
--- a/tests/Php80/Php80Test.php
+++ b/tests/Php80/Php80Test.php
@@ -87,6 +87,24 @@ public function testPregMalformedUtf8Offset()
         );
     }
 
+    /**
+     * @covers \Symfony\Polyfill\Php80\Php80::str_contains
+     */
+    public function testStrContains()
+    {
+        $this->assertTrue(str_contains('abc', ''));
+        $this->assertTrue(str_contains('abc', 'a'));
+        $this->assertTrue(str_contains('abc', 'bc'));
+        $this->assertTrue(str_contains('abc', 'abc'));
+        $this->assertTrue(str_contains('한국어', '국'));
+        $this->assertTrue(str_contains('한국어', ''));
+        $this->assertTrue(str_contains('', ''));
+        $this->assertFalse(str_contains('abc', 'd'));
+        $this->assertFalse(str_contains('abc', 'abcd'));
+        $this->assertFalse(str_contains('DÉJÀ', 'à'));
+        $this->assertFalse(str_contains('a', 'à'));
+    }
+
     public function fdivProvider()
     {
         return array(