PHP array tutorial _ PHP Tutorial-php Tutorial

PHP array usage tutorial. When using PHP for development, you need to create many similar variables either early or late. Without many similar variables, you can store data as elements in an array. When using PHP for development, you need to create many similar variables either early or late.

Without many similar variables, you can store data as elements in an array.

All elements in the array have their own IDs, so they can be easily accessed.

There are three types of arrays:

Numeric array

Array with digit ID key

Example

$ Names = array ("Peter", "Quagmire", "Joe ");

Echo $ names [1]. "and". $ names [2]. "are". $ names [0]. "'s neighbors ";

Output of the above code:

Quagmire and Joe are Peter's neighbors

Join array

Each ID key in the array is associated with a value.

$ Ages = array ("Peter" => 32, "Quagmire" => 30, "Joe" => 34 );

Echo "Peter is". $ ages ['Peter ']. "years old .";

Output of the above script:

Peter is 32 years old.

Multi-dimensional array

Array containing one or more arrays

$ Families = array

(

"Griffin in" => array

(

"Peter ",

"Lois ",

"Megan"

),

"Quagmire" => array

(

"Glenn"

),

"Brown" => array

(

"Cleveland ",

"Loretta ",

"Junior"

)

);

If this array is output, it should be similar to the following:

Array

(

[Griffin in] => Array

(

[0] => Peter

[1] => Lois

[2] => Megan

)

[Quagmire] => Array

(

[0] => Glenn

)

[Brown] => Array

(

[0] => Cleveland

[1] => Loretta

[2] => Junior

)

)

When developing PHP, you need to create many similar variables either early or late. Without many similar variables, you can store data as elements in an array ....