docs: auto-update file list in README

Author: github-actions[bot]

README.md

@@ -30,8 +30,10 @@ Below is an automatically updated list of all PHP programs available in this rep
 - [📄 Numeric_array.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/Numeric_array.php)
 - [📄 Operator.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/Operator.php)
 - [📄 Prime_Number.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/Prime_Number.php)
+- [📄 Solar_time.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/Solar_time.php)
 - [📄 String.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/String.php)
 - [📄 Switch_Case.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/Switch_Case.php)
+- [📄 age.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/age.php)
 - [📄 array.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/array.php)
 - [📄 as-array.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/as-array.php)
 - [📄 associate-array.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/associate-array.php)
@@ -45,13 +47,16 @@ Below is an automatically updated list of all PHP programs available in this rep
 - [📄 if_else.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/if_else.php)
 - [📄 if_else_if_statments.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/if_else_if_statments.php)
 - [📄 leapyear.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/leapyear.php)
+- [📄 location.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/location.php)
 - [📄 multidimensional.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/multidimensional.php)
 - [📄 parameterized.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/parameterized.php)
+- [📄 postion-characters-string.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/postion-characters-string.php)
 - [📄 rectangle.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/rectangle.php)
 - [📄 reference.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/reference.php)
 - [📄 spaceship_opratior.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/spaceship_opratior.php)
 - [📄 str-upper-and-lower.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/str-upper-and-lower.php)
 - [📄 stringopraters.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/stringopraters.php)
+- [📄 substr.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/substr.php)
 - [📄 truth_tables.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/truth_tables.php)
 - [📄 ucfirst.php](https://github.com/ParasGupta-BCA/PHP-Programs/blob/main/ucfirst.php)
 <!-- FILES_END -->