PHP/Data Type/boolean
Содержание
Boolean type constant: FALSE
<source lang="html4strict">
<? if (FALSE)
print("This will never print
");
else
print("This will always print
");
?>
</source>
Boolean values
<source lang="html4strict">
<? $a=100; if($a==100) {
echo "the variable equals 1!
";
} if($a==true) {
echo "the variable is true!
";
} ?>
</source>
Converting from a boolean to a string will produce a 1 if the boolean is set to true, or an empty string if false.
<source lang="html4strict">
<?
$bool = true; print "Bool is set to $bool\n"; $bool = false; print "Bool is set to $bool\n";
?>
</source>
PHP provides a couple of constants especially for use as Booleans: TRUE and FALSE
<source lang="html4strict">
<? if (TRUE)
print("This will always print
");
else
print("This will never print
");
?>
</source>