<?php
// First script
$a = 1;
echo $a + $a++; // may print either 2 or 3 => Finally, no, it always print 3
echo "\n";
// Second script
$i = 1;
$array[$i] = $i++; // may set either index 1 or 2 => Same here, array will always contain index 2 and value 1
var_export($array);
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
3
array (
2 => 1,
)