this example shows how to use simple functions of a string like hashing string to MD5 and breaking it down with respect to a known delimiter like whitespace
this example shows how to initialize a string and concatenates strings using the dot '.' operator
this example shows how to sort an array in ascending and descending order and also shows how to shuffle an array using sort(), rsort() and shuffle() funcitons
this example to show how to loop through arrays in 2 different ways:
1- normal loop which shows how to use sizeof() function as well
this example shows how to create arrays in 3 distinctive ways
1- using the array() function which is pre-defined inside php
2- using indexed method like most programming languages
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