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Unit 6: Arrays

$merged_array = array_merge($first_array,$second_array,$third_array); Notes

print_r($merged_array);
//Output: Array
// ( [0] => 1
// [1] => 2
// [2] => 3
// [3] => 4
// [4] => 5
// [5] => 6
// )
?>
6.4.4 Searching for a Value in an Array
Searching for a value in an array is made simple using the function array_search(). If the keyword
is found in the array, then the corresponding key of that value is retured for further operations.
The syntax and example are:
array_search ( keyword, array name )
<?php

$months = array(1=>”Jan”, “Feb”, “Mar”, “Apr”, “May”, “June”, “July”, “Aug”,
“Sep”, “Oct”, “Nov”, “Dec”);

$key = array_search(“May”, $months); //Searching for May in months array

echo $key;
// We can also print the value that key points at

echo $months[$key];

?>

6.4.5 Sorting Arrays

It is often useful to sort related data stored in an array. Taking a one-dimensional array and
sorting it into order is quite easy.

Using sort()
The following code results in the array being sorted into ascending alphabetical order:

$products = array( ‘Tires’, ‘Oil’, ‘Spark Plugs’ );
sort($products);
Our array elements will now be in the order Oil, Spark Plugs, Tires.

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