PhP_07

<html>
<head>
    <title> Function </title>
</head>
<body align='center'>
</body>
</html>
<?php

function abc($tg, $text)
{
    $tg;
    $test;
    echo "<".$tg.">".$text."</".$tg.">";
    echo "<hr>";
}

abc("b", "Bold");
abc("i", "Italic");
abc("u", "Underline");
abc("s", "Strick");

//function_exists(); use for check function available or not in This Php Page

if (function_exists('abc'))
{
    echo "functions are available.<br />\n";
}

else
{
    echo "functions are not available.<br />\n";
}

//check abcd function available or not in This Php Page
if (function_exists('abcd'))
{
    echo "functions are available.<br/>";
}

else
{
    echo "functions are not available.<br/>";
}

?>