Common array manipulation functions in PHP (1/8) _php Tutorial

An array is a set of elements that have some common characteristics, including similarity and type.
Each element is distinguished by a special identifier, called key, and each key has a value
1. Two ways to create an array:
1.1 using the array () function

The code is as follows	Copy Code
$usernames = Array (' Alerk ', ' Mary ', ' Lucy ', ' Bob ', ' Jack ', ' John ', ' Mark '); foreach ($usernames as $name) { Echo $name. ' '; } ?> Output Alerk Mary Lucy Bob Jack John Mark

1.2 Using the range () function

The code is as follows	Copy Code
$numbers = Range (0, 10); foreach ($numbers as $num) { Echo $num. ' '; } $letters = Range (' A ', ' Z '); foreach ($letters as $letter) { Echo $letter. ' '; } ?> Output 0 1 2 3 4 5 6 7 8 9 10 A C D E F G H I J K L M O Q R T U V W X Y Z

2. Iterate through the array elements in two ways:
2.1 For Loop

The code is as follows	Copy Code
The third parameter of range indicates the step size $numbers = range (1,10,2); for ($i = 0; $i { echo $numbers [$i]. ' '; } ?> Output 1 3 5 7 9

1 2 3 4 5 6 7 8

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