A. You need to use the following php functions:
a] strpos() : Find position of first occurrence of a string
b] substr() : Return part of a string
c] substr_replace() : Replacing a substring
Find position of first occurrence of a string with strpos()
Find out if $input contains a # symbol or not:<?php
if (strpos($input, '#') === true ) {
print '# symbol found in input';
}
else{
print 'There was no # symbol found in input';
}
?>
Extracting a substring with substr()
<?phpThis is useful for finding out usernames and other data.
$input = "nixCraft blog";
// substr syntax
// $substring = substr($string,$start,$length);
// Get first 5 chars of $input
$data = substr($input,0,5);
print $data;
?>
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