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PHP PHP Functions Introducing Functions PHP Function Arguments

Ker Sing Tan
Ker Sing Tan
10,573 Points
Posted by Ker Sing Tan
Ker Sing Tan
10,573 Points

is_array($arr) question

is_array($arr) is placing before foreach loop, means that we will validate if $arr is an array before we run foreach loop. So in this case, why should we set the array to $arr = array (name1, name2) instead? In the example, we assign array to '$name' and $name come after the is_array($arr) validation, so I suppose the is_array($arr) should equal to false?

1 Answer

nathanl
nathanl
9,458 Points
nathanl
nathanl
9,458 Points

Functions are not executed automatically when the page loads; they are only executed when called.

In the example, you have a function named hello which validates whether or not the argument is an array. The actions in this function are only performed when hello($names) is executed at the end.

For clarity the order of execution is as follows:

  1. The $names variable is set to the array
  2. The hello() function is called with the $names variable passed in as the argument
  3. The hello() function is run and performs the defined actions