PHP Lingual Comparison Operators

		virtually_equal()	perhaps_virtually_equal()
"Water"	"Forest"	false	false
"Forest"	"Fire storm"	true	true
"Fire storm"	"Friend"	false	true
"Friend"	"Enemy"	false	false
"Enemy"	"Emine'"	true	true
"Emine'"	"Bird"	false	false
"Bird"	"Breakfast"	false	true
"Breakfast"	"Barkeeper"	true	true
"Barkeeper"	"Barchair"	false	true
"Barchair"	"Bar"	false	true
"Bar"	"Broarh"	false	true
"Broarh"	"End"	false	false
"End"	"Ey maat!"	true	true
"Ey maat!"	"Sux"	false	false
"Sux"	"Socks"	true	true


<html>

<head>

<title>PHP Lingual Comparison Operators</title>

<style type="text/css">

body { font-family: Georgia, serif; }

td { border-top: 1px solid #CCCCCC; padding: 2px 20px 1px 0; }

em { color: #669900; }

a { color: #006600; }

#source { background-color: #F7F7F7; }

</style>

</head>

<body>



<h1>PHP Lingual Comparison Operators</h1>



<table>

    <tr>

        <th></th>

        <th></th>

        <th>virtually_equal()</th>

        <th>perhaps_virtually_equal()</th>

    </tr>



<?php



function virtually_equal($a, $b)

{

    return soundex($a) == soundex($b);

}



function virtually_not_equal($a, $b)

{

    return !virtually_equal($a, $b);

}



function perhaps_virtually_equal($a, $b)

{

    return substr(soundex($a), 0, 2) == substr(soundex($b), 0, 2);

}



function perhaps_virtually_not_equal($a, $b)

{

    return !perhaps_virtually_equal($a, $b);

}



$tests = array("Water", "Forest", "Fire storm", "Friend", "Enemy", "Emine'",

    "Bird", "Breakfast", "Barkeeper", "Barchair", "Bar", "Broarh", "End",

    "Ey maat!", "Sux", "Socks");



for ($i = 0; $i < count($tests) - 1; $i++)

{

    $a = $tests[$i];

    $b = $tests[$i + 1];

    echo '<tr>';

    echo '<td>"' . htmlspecialchars($a) . '"</td>';

    echo '<td>"' . htmlspecialchars($b) . '"</td>';

    echo '<td>' . (virtually_equal($a, $b) ? "<em>true</em>" : "false") . '</td>';

    echo '<td>' . (perhaps_virtually_equal($a, $b) ? "<em>true</em>" : "false") . '</td>';

    echo '</tr>';

}





?>



</table>



<p>

    Idea: Klaus Quindt,

    Realization: <a href="http://maettig.com/">Thiemo M&auml;ttig</a>,

    2003-12-03

</p>



<p><a href="<?php echo $_SERVER['PHP_SELF']; ?>?source=1">Show source</a></p>

<div id="source"><?php if (isset($_REQUEST['source'])) show_source(__FILE__); ?></div>



</body>

</html>