string handling

substring examples

some examples using substr(),
extracting the first, last, n chars of a string.
reverse a string or see how many times a char is used in a string.

full source of substring examples [ line 1 - 29 ] | download substring examples

1	<?php
2	echo '
3	<form method="post" action="'.$_SERVER['PHP_SELF'].'">
4	<input type="text" name="word">
5	<input type="submit" value="see">
6	</form>';
7	if(!empty($_POST['word']))
8	{
9	$str = $_POST['word'];
10	$char['original'] = $str;
11	$char['words'] = explode(' ',$str);
12	$char['word_count'] = count($char['words']);
13	$char['first_char'] = substr($str,0,1);
14	$char['last_char'] = substr($str,-1);
15	$char['all_but_first_char'] = substr($str,1);
16	$char['all_but_last_char'] = substr($str,0,-1);
17	for($x = 0; $x < strlen($str); $x++)
18	{
19	$char['chars'][] = substr($str,$x,1);
20	$char['char_repeat'][substr($str,$x,1)]++;
21	}
22	$char['char_count'] = strlen($str);
23	ksort($char['char_repeat']);
24	$char['reverse'] = join('',array_reverse($char['chars']));
25	echo '<pre>';
26	print_r($char);
27	echo '</pre>';
28	}
29	?>

14 hits by 7 users in the last 30 minutes.