PHP if empty code example

Example 1: jquery check if empty object

jQuery.isEmptyObject( object );

Example:
jQuery.isEmptyObject({}) // true
jQuery.isEmptyObject({ foo: "bar" }) // false

Example 2: php code to check if variable is null

if(empty($var1)){
    echo 'This line is printed, because the $var1 is empty.';
}

Example 3: php check for empty string

if (empty($var)) {
    echo '$var is either 0, empty, or not set at all';
}

Example 4: php check empty variable

empty var php