How does PHP handle full boolean evaluation in expressions?

When PHP evaluates boolean expressions, it uses short-circuit evaluation. This means that if the outcome of the expression can be determined by only evaluating part of it, PHP will not evaluate the rest of the expression. To ensure full boolean evaluation in expressions, you can use the logical operators "&&" and "||" instead of their shortcut versions "and" and "or". 

// Using && and || for full boolean evaluation
$var1 = true;
$var2 = false;

// Using && will ensure both conditions are evaluated
if ($var1 && $var2) {
    echo "Both conditions are true";
}

// Using || will ensure both conditions are evaluated
if ($var1 || $var2) {
    echo "At least one condition is true";
}

Keywords

PHP boolean evaluation expressions short-circuiting logical operators

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