Update introduction.md

Author: veraulitinaYa

exercises/concept/language-list/.docs/introduction.md

@@ -35,18 +35,7 @@ $prime_numbers[] = 11; // array now contains [2, 3, 5, 7, 11]
 
 ### Performing Actions with Arrays
 
-PHP provides functions you can use to modify arrays and work with items in arrays. Below are some of the frequently used ones:
-
-```php
-$prime_numbers = [2, 3, 5, 6];
-
-count($prime_numbers); // 4
-
-array_shift($prime_numbers); // array now contains [3, 5, 6]
-
-array_pop($prime_numbers); // array now contains [3, 5]
-
-```
+PHP provides functions you can use to modify arrays and work with items in arrays. The PHP documentation offers detailed information array functions in the [array](https://www.php.net/manual/en/language.types.array.php) documentation.
 
 ## Variable-Length Arguments