Detailed explanation of how to use php compact() function

The compact() function is a built-in function in PHP, which is used to create arrays using variables. This function is the opposite of the extract() function. It creates an associative array whose keys are variable names and whose corresponding values ​​are array values.

Syntax:

array compact("variable 1", "variable 2"...)

Parameters: This function accepts a variable number of parameters separated by the comma operator (', '). These parameters are of string data type and specify the names of the variables we want to use to create the array. We can also pass an array as argument to this function, in which case all the elements in the array passed as argument will be added to the output array.

Return value: This function returns an array with all variables added.

Note: Any string passed as an argument that does not match a valid variable name will be skipped and will not be added to the array.

Example:

输入 : $AS="ASSAM", $OR="ORISSA", $KR="KERELA"
        compact("AS", "OR", "KR");
输出:
Array
(
    [AS] => ASSAM
    [OR] => ORISSA
    [KR] => KERELA
)

The following program illustrates how the compact() function in PHP works:

Example-1:

<?php 
      
$AS = "ASSAM"; 
$OR = "ORISSA"; 
$KR = "KERELA"; 
      
$stats = compact("AS", "OR", "KR"); 
  
print_r($states); 
  
?>

Output:

Array
(
    [AS] => ASSAM
    [OR] => ORISSA
    [KR] => KERELA
)

Example-2:

<?php 

$username = "max"; 
$password = "many"; 
$age = "31"; 
  
$NAME = array("username", "password"); 
  
$result = compact($NAME, "age"); 
      
print_r($result); 
  
?>

Output:

Array
(
    [username] => max
    [password] => many
    [age] => 31
)

Related recommendations: "PHP Tutorial 》

This article is an introduction to the use of the php compact() function. I hope it will be helpful to friends in need!

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