Php reference address to change the variable value _ PHP Tutorial

Php reference address to change the variable value. Copy the code as follows :? Php $ fooBob; assign Bob to $ foo $ bar and reference $ fooecho $ foo.br through $ bar; $ barMynameis $ bar; modify the $ bar variable echo $ bar. The code is as follows:

$ Foo = 'Bob'; // assign 'Bob' to $ foo.
$ Bar = & $ foo; // Reference $ foo through $ bar
Echo $ foo .'
';
$ Bar = "My name is $ bar"; // modify the $ bar variable.
Echo $ bar .'
';
Echo $ foo .'
'; // The value of $ foo is also modified.
?>

Output:
Bob
My name is Bob
My name is Bob
We can see that the original value is indeed modified, after being referenced and assigned a value, but before being assigned a value, the original variable will not change.

The http://www.bkjia.com/PHPjc/325218.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/325218.htmlTechArticle code is as follows :? Php $ foo = 'Bob'; // assign 'Bob' to $ foo $ bar = // Reference $ foo echo $ foo through $ bar. 'Br/'; $ bar = "My name is $ bar"; // modify the $ bar variable echo $ bar ....