How to exchange the values ​​of two variables in PHP without using intermediate variables

Interchange method: 1. Use the string splitting function explode() provided by PHP to achieve this. The syntax "$b=explode("|",$a."|".$b);$a =$b[1];$b=$b[0];"; 2. Use assignment operations and addition and subtraction operations to achieve this. The syntax is "$a=$a $b;$b=$a-$b;$ a=$a-$b;"; 3. Use arrays and list() functions to implement, the syntax is "list($b,$a)=array($a,$b);".

The operating environment of this tutorial: windows7 system, PHP8 version, DELL G3 computer

There is no need for intermediate variables in PHP ( The third variable) exchanges the values ​​​​of the two variables

Method 1: Use the string splitting function explode provided by PHP to achieve

<?php
$a=333;
$b=444;
$b=explode("|", $a."|".$b);
var_dump($b);
$a=$b[1];
$b=$b[0];
echo $a."<br>";
echo $b;
?>

Output result:

Method 2: Use assignment operations and addition and subtraction operations to realize

<?php
header("Content-type:text/html;charset=utf-8");
$a=333;
$b=444;
$a=$a+$b;
$b=$a-$b;
$a=$a-$b;
echo $a."<br>";
echo $b;
?>

Output result:

Method 2: Use arrays and list() functions to implement

Implementation ideas:

• Store the values ​​of two variables into an array in order

• Use list() to assign the values ​​in the array to two variables in reverse order

  list() function is used to assign values ​​to a set of variables in one operation.

<?php
$a=333;
$b=444;
list($b,$a)=array($a,$b);
echo $a."<br>";
echo $b;
?>

Output results:

Recommended learning: "PHP Video Tutorial"

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