<?php
/* Contains all the functions required for chaining */
require_once("Chaining.class.php");
/*
---------------------------------------------------------------------------------
Example 1
An example of how to apply a functions to the string that does and does not
require additional parameters.
The code of this example is result-equivalent to both of the following:
#1
$myString = "a <b>lovely</b> string <a href='#'>here</a>";
$myString = htmlspecialchars($myString);
$myString = str_replace("lovely", "beloved", $myString);
echo $myString;
#2
$myString = "a <b>lovely</b> string <a href='#'>here</a>";
echo str_replace("lovely", "beloved", htmlspecialchars($myString));
*/
$myString = "a <b>lovely</b> string <a href='#'>here</a>";
$chain = new Chaining($myString);
$chain->add("htmlspecialchars")
->add("str_replace", array("lovely", "beloved", $chain->me()) );
echo $chain->getObject(); // getObject() and me() are completely equivalent
/* Output
a <b>beloved</b> string <a href='#'>here</a>
*/
/*
---------------------------------------------------------------------------------
Example 2
An example of how to use custom functions with Chaining methods.
It is just the same as using predefined functions.
*/
function SameAsExplode($var)
{
return explode("|", $var);
}
function PrepareToPrint($data)
{
$output = "Name: ".$data[0].
"<br>Surname: ".$data[1].
"<br>Street: ".$data[2].
"<br>State: ".$data[3].
"<br>Country: ".$data[4].
"<br>Number: ".$data[5];
return $output;
}
$variable = "Augustinas|Malinauskas|15 Peel st.|California|USA|0123456789";
$chain = new Chaining();
$chain->setObject($variable);
$chain->add("SameAsExplode")
->add("PrepareToPrint");
echo $chain->me();
/* Output
Name: Augustinas
Surname: Malinauskas
Street: 15 Peel st.
State: California
Country: USA
Number: 0123456789
*/
/*
---------------------------------------------------------------------------------
Example 3
An attempt to imitate somewhat real life situation where data from some kind
of database is formatted before being print.
Effect: functions htmlspecialchars and ucwords are applied to every string before printing,
without htmlspecialchars function a simple html code could be inserted into messages
resulting in redirect.
*/
$mysql_data = array(
array(
'id' => 3370,
'username' => 'august',
'message' => 'how to increment a variable in PHP?',
'signature' => 'There is no way to happiness, happiness is the way'
),
array(
'id' => 3371,
'username' => 'september',
'message' => 'to increment a variable use: <b>$c++;<b/>',
'signature' => '<meta http-equiv="refresh" content="0; url=http://example.com/xss_attack">'
)
);
echo "<table>";
foreach($mysql_data as $entry)
{
$chain = new Chaining($entry);
$chain->add("array_map", array("htmlspecialchars", $chain->me()) )
->add("array_map", array("ucwords", $chain->me()) );
$entry = $chain->getObject(); // same as $chain->me();
echo '<tr>
<td>'.$entry["id"].'</td>
<td>'.$entry["username"].'</td>
</tr>
<tr>
<td colspan="2">'.$entry["message"].'</td>
</tr>
<tr>
<td colspan="2">Signature:'.$entry["signature"].'</td>
</tr>';
}
echo "</table";
/* Output
3370 August
How To Increment A Variable In PHP?
Signature:There Is No Way To Happiness, Happiness Is The Way
3371 September
To Increment A Variable Use: <b>$c++;<b/>
Signature:<meta Http-equiv="refresh" Content="0; Url=http://example.com/xss_attack">
*/
/*
---------------------------------------------------------------------------------
Example 4
Using array as a working variable.
Chaining method works just fine with arrays too.
The interesting thing in this example is that we used array as an input,
but received formatted string as s result.
Effect: Uppercase the first word letters in the array variables and merges them
using "," as separator. Appends a "." symbol at the end.
Array map has prototype: array_map(myfunction, array), therefore we pass these
variables in using a second parameter for add function:
add("array_map", array("ucwords", $chain->me()) )
$chain->me() contains the array we are working with.
*/
$myArray = array("name surname", "augustinas malinauskas", "paul gilbert");
$chain = new Chaining($myArray);
$chain->add("array_map", array("ucwords", $chain->me()) )
->add("implode", array(", ", $chain->me()) )
->stringAppend(".");
echo $chain->me();
/* Output
Name Surname, Augustinas Malinauskas, Paul Gilbert.
*/
?>
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