PHP Operators

Arithmetic + - * / % **, comparison == === != !== < >, logical && || ! (or and, or), and the null coalescing operator ??.

ExamplePHP

<?php
var_dump(5 == "5");    // loose: equal after conversion
var_dump(5 === "5");   // strict: same type and value
var_dump(5 <=> 3);     // spaceship: 1, 0 or -1

$user = null;
echo $user ?? "guest", "\n";   // default when null

$x = 10;
$x .= " apples";
echo $x, "\n";
$count = 0;
$count++;
echo $count, "\n";

Output

bool(true)
bool(false)
int(1)
guest
10 apples
1

Prefer ===: it checks the type too and avoids surprises from automatic conversion.

Quick check

Which comparison also checks the type?

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Finish the quick check (and any code exercise) to complete this lesson, or mark it done yourself.

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