Reference   PHP

Summary

You can pass a variable by reference.

Requirements

None.

• reference.php

<?php

$a = [];
$a['name'] = 'apple';
$b =& $a['name'];

echo "$b / ";

$b = 'banana';

echo $a['name'];

function assign(&$to, $str) { // $to is a reference variable
    $to = $str;
}

assign($a['name'], 'lemon');

echo " / $b";

Result

apple / banana / lemon

References

• https://www.php.net/manual/en/language.references.pass.php
• https://www.php.net/manual/en/language.references.return.php
• https://www.php.net/manual/en/language.references.unset.php
• https://www.php.net/manual/en/language.references.spot.php

Tags

#pointer  #reference