How to use php array function

The array() function is a built-in function in PHP, used to create arrays (index arrays, associative arrays, multidimensional arrays). This function creates an array with a key and a value. If the key is omitted when specifying the array, an integer key is generated that starts at 0 and increments by 1. To create an associative array, use => to separate keys and values.

How to use the php array() function?

php array() function generates an array.

In PHP, there are three types of arrays:

○ Numeric array - an array with a numeric ID key

○ Associative array - an array with a specified key , each key is associated with a value

○ Multidimensional array - an array containing one or more arrays

Syntax

Syntax for indexing arrays:

array(value1,value2,value3,....);

Syntax for associative arrays:

array(key=>value,key=>value,key=>value,....);

Syntax for multi-dimensional arrays:

array( array( value11, value12, ...)
    array( value21, value22, ...)
       ... )

Parameters:

● key: Specifies the key name (numeric value or string).

● Value: Specifies the key value.

Return value: Returns an array with parameters.

Description: array() creates an array with keys and values. If key is omitted when specifying an array, an integer key is generated that starts at 0 and increments by 1. To create an associative array with array(), use => to separate the keys and values. To create an empty array, pass no arguments to array().

php array() function example

<?php
header("content-type:text/html;charset=utf-8"); 
//创建一个索引数组
$teacher = array("西门","灭绝","无忌");
$len = count($teacher);
for ($i = 0; $i < $len; $i++)
{    
echo $teacher[$i];    
echo "<br>";
}
echo "<br>";
//创建一个关联数组并输出
$teacher = array("class" => "php中文网","name" => "peter","age" => "30");
echo $teacher[&#39;class&#39;]. "有个老师名字叫" .$teacher[&#39;name&#39;]. ",他有" .$teacher[&#39;age&#39;]. "岁了";
?>

Output:

西门
灭绝
无忌
php中文网有个老师名字叫peter,他有30岁了

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