Reflection for references
Reflection for references — Nikita Popov
https://wiki.php.net/rfc/reference_reflection — https://github.com/php/php-src/pull/3550/files#diff-3d0f8818dac092be87cf355bee98bccfR2
Detecting if %$array1[$key]% is a reference:
<?php
$array2 = $array1;
$array2[$key] = $unique_cookie;
if ($array1[$key] === $unique_cookie) {
// $array1[$key] is a reference
}
?>
No longer will work reliably in PHP 7.4 due to typed properties, so %ReferenceReflection% was added.
<?php
$array = [0, 1, 2];
$ref1 =& $array[1];
$ref2 =& $array[2];
$array[3] =& $array[2];
$r0 = ReflectionReference::fromArrayElement($array, 0);
$r1 = ReflectionReference::fromArrayElement($array, 1);
$r2 = ReflectionReference::fromArrayElement($array, 2);
$r3 = ReflectionReference::fromArrayElement($array, 3);
var_dump( $r0, $r1 );
echo base64_encode( $r1->getId() ), "\n";
echo base64_encode( $r2->getId() ), "\n";
echo base64_encode( $r3->getId() ), "\n";