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36 lines
673 B
PHP
36 lines
673 B
PHP
<?php
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// Boolean logic is used to combine booleans to return another boolean.
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// Using double ampersands tells PHP to check if both values are true.
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// If so, it will return true. If not, it will return false.
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$a = true;
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$b = true;
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$c = false;
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// Returns true.
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$a && $b;
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// Returns false.
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$a && $c;
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// Using two pipe characters checks if either value is true.
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// Then, it will return true. If both values are false, the PHP
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// returns false.
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$a = true;
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$b = false;
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$c = false;
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$d = true;
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// Returns true.
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$a || $b;
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// Returns false.
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$b || $c;
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// Returns true.
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$a || $d;
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// Using an exclamation point returns the value flipped.
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$d = true;
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// Outputs false.
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echo !$d;
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