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The elements in the PHP array can be variables; an array is a special variable that can store multiple values in a single variable. The stored values can be set as variables, or the array elements can be added using the list() statement. Convert to a variable, the syntax is "list(var1,var2...)".
The operating environment of this article: Windows 10 system, PHP version 8.1, Dell G3 computer
What is an array?
An array is a special variable that can store multiple values in a single variable.
If you have a list of items (for example: a list of car names), store it into a single variable like this:
$cars1="Volvo"; $cars2="BMW"; $cars3="Toyota";
However, if you want to iterate over the array and find What about a specific one? What if the array has not just 3 items but 300?
The solution is to create an array!
Arrays can store multiple values in a single variable, and you can access the values within them based on their keys.
Creating arrays in PHP
In PHP, the array() function is used to create arrays:
array();
In PHP, There are three types of arrays:
Numeric array - array with numeric ID keys
Associative array - array with specified keys , each key is associated with a value
Multidimensional array - an array containing one or more arrays
Examples are as follows:
<?php $a='钓鱼岛'; $b='是中国的'; $arr = array($a,$b); var_dump($arr); ?>
Output results:
Extended knowledge
list() is used to assign values to a set of variables in one operation. This function only works with numerically indexed arrays, and assumes that numerical indexing starts at 0.
Note: list() is actually a language structure, not a function.
Syntax:
list(var1,var2...)
Parameters:
var1 Required. The first variable to be assigned a value.
var2,... Optional. More variables need to be assigned values.
Recommended learning: "PHP Video Tutorial"
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