␡
- Accessing All Elements of Numeric Arrays
- Accessing All Elements of Associative Arrays
- Accessing All Array Elements in Nested Arrays
- Turning an Array into Variables
- Converting Strings to Arrays
- Converting Arrays to Strings
- Sorting Arrays Alphabetically
- Sorting Associative Arrays Alphabetically
- Sorting Nested Arrays
- Sorting Nested Associative Arrays
- Sorting IP Addresses (as a Human Would)
- Sorting Anything
- Sorting with Foreign Languages
- Applying an Effect to All Array Elements
- Filtering Arrays
- Getting Random Elements Out of Arrays
- Making Objects Behave Like Arrays
This chapter is from the book
This chapter is from the book
This chapter is from the book
This chapter is from the book
Getting Random Elements Out of Arrays
array_rand($numbers, 6)
<?php
for ($i = 1; $i <= 49; $i++) {
$numbers[] = $i;
}
// we could use range() instead, too
echo implode(' ', array_rand($numbers, 6));
?>
Picking Random Elements Out of an Array (array_rand.php)
With array_rand(), one or more random elements out of an array are determined by random. This can, for instance, be used to draw some lucky numbers. For instance, the German lottery draws 6 numbers out of 49. The preceding code implements this drawing using PHP and array_rand(); see Figure 2.7 for its output. The first parameter for this function is the array; the second (optional) one is the number of elements to be returned.
)
Figure 2.7. Lucky numbers with PHP