In PHP, a boolean is a datatype representing a value that is either true or false. Boolean values are often used in programming logic and conditions. Here are some examples of how to use boolean in PHP:
1. Declaring a boolean variable:
$flag = true; // or $flag = false;
2. Using boolean values in an if statement:
if ($flag) {
echo "Flag is true";
} else {
echo "Flag is false";
}
3. Comparing boolean values using relational operators:
$flag1 = true;
$flag2 = false;
if ($flag1 == $flag2) {
echo "Flags are equal";
} elseif ($flag1 && !$flag2) {
echo "Flag1 is true and Flag2 is false";
} elseif (!$flag1 && $flag2) {
echo "Flag1 is false and Flag2 is true";
} else {
echo "No match found";
}
4. Using boolean values with logical operators:
$flag1 = true;
$flag2 = false;
if ($flag1 && $flag2) {
// this condition will not pass since $flag2 is false
echo "Both flags are true";
} elseif ($flag1 || $flag2) {
// this condition will pass since $flag1 is true
echo "At least one flag is true";
} else {
// this condition will not be reached since one flag is true
echo "No flags are true";
}