PHP. Conditional Operators
Today we will consider conditional operators if, if…else, if…elseif…else. A lot of this you may know from javascript. If..else also has got short syntax. Also we’ll try to use switch, which replaces a lot of if.else entities.
if...else example
if(condition) {
//some code
} elseif (condition) {
//some code
} elseif (condition) {
//some code
} elseif (condition) {
//some code
}
else {
//some code
}As you understand, it can be a lot of elseif entities in the code. Switch is more compact.
Code lesson
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<?php
$a = 4;
if($a>5) {
echo $a;
} else {
echo $a-- ."<br>";
}
echo $b = ($a!=2) ? 2 : 1;
echo "<br>";
if(condition) {
//some code
} elseif (condition) {
//some code
} elseif (condition) {
//some code
} elseif (condition) {
//some code
}
else {
//some code
}
echo "b равно $b";
$b=7;
echo "<br>";
switch ($b) {
case 5:
echo "b равно 5";
break;
case 6:
echo "b равно 6";
break;
default:
echo "b равно чему-то там";
break;
}
?>
</body>
</html>
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