- Is PHP client-side or server-side technology?
Answer:
Server side.
- Explain the notion of coercion.
Give an example in PHP.
Answer:
A coercion is an implicit forced conversion of one data type to
another.
In the PHP example below, the string "5" is coerced to be an integer.
if ("5" < 7) return true; // "5" coerced to integer; returns true.
-
What are the final (key,value) pairs in the following PHP array?
$arr[2] = "Alice";
$arr["October"] = 31;
$arr["November"] = 30;
unset($arr["October"]);
Answer:
There are two key,value pairs:
2 => "Alice",
"November" => 30
See
the example as a PHP script.
-
Consider the following HTML skeleton input form:
< form action = "http://www.somewhere.com/fun.php" method = "post" >
< input type = "text" name = "stripes" size = "3" >
< input type = "submit" value = "Send Stripes" >
< /form >
Explain how the PHP script fun.php
would access the text in the textbox named stripes
after the client pressed the Send Stripes button.
Answer:
The PHP script would access the _POST array (or the _REQUEST array)
as in:
$stripes = $_REQUEST["stripes"];
(Note: This used to say _RESPONSE.
The right variable, of course, is _REQUEST.)