Examples of usage of OR in PHP_PHP tutorial

Maybe you haven't noticed the existence of OR at all, so let's take a look at an example first:

$choice1 = "ctohome.com";
$choice2 = "";
$default = "php. net";

$val_1 = $choice1 || $choice2 || $default;
$val_2 = $choice1 or $choice2 or $default;
$val_3 = ($choice1 or $choice2 or $default);

echo "val_1=$val_1 val_2=$val_2 val_3=$val_3 ";

$x_1 = foo() or bar();
$x_2 = $x_1 or bar();
$x_3 = ($x_1 or bar());

echo "x_1=$x_1 x_2=$x_2 x_3=$x_3";

function foo() {
return 0;
}

function bar() {
return 1;
}

The operation result is:

$val_1=1 $val_2=ctohome.com $val_3=1
x_1=0 x_2=0 x_3=1

Did you do it right?


In addition OR is equivalent to IF to some extent, such as:

is_array ($variable) OR notAnArray();

function notAnArray() {
echo "This is not an array";
}

The language explanation is difficult, so try it yourself

http://www.bkjia.com/PHPjc/532121.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/532121.htmlTechArticleMaybe you haven’t noticed the existence of OR at all, so let’s look at an example first: $choice1 = "ctohome.com "; $choice2 = ""; $default = "php.net"; $val_1 = $choice1 || $choice2 || $default; $val_...