Functions
To show the use of a built in function I am going to use the array_filter() function. I will give the Apache an array of numbers to sift, where it will output the even numbers!
My built in array:
Array
(
[1] => 22
[3] => 24
[5] => 26
[7] => 28
[9] => 30
)
Explanation
The numbers that print to the left (1,3,5,7,9) are the original positions that the numbers had in the array.
This is somewhat of a difficult built in function, so I will give another example below
Round function
3.4579
The rounded number is: 3
Here is my user defined function:
My name is Joe, I have brown hair and blue eyes. Explanation
The function descriptionPerson that concatenates the input parameters into a string. When the function is called it outputs the sentence with the proper parameters.
PHP functions are essential for structuring your code in a clean, effecient, and reusable way.