<?php
*# Hello Community
# Internationalisation, a topic discussed more than enough and YES, I am
looking forward to PHP6.
# But in reality I still have to develop for PHP4 and that's where the dog
is burried ^^
# We have a customer here who is running a small site, but still in five
different languages.
# Lately he started complaining about some strange site behaviours:
# He has a discussion board where people can post their ideas, comments etc.
Nothing special
# Every post has a maximum length of 2048 characters, which is checked by
JavaScript at the Browser
# and after submitting the form by PHP.
# Our mistake was to use strlen();*
global $cc_strlen; global $cc_mb;
$cc_strlen = $cc_mb = 0;
if (array_key_exists('text', $_POST)) {
$cc_strlen = strlen($_POST['text']);
$cc_mb = mb_strlen($_POST['text'], 'UTF-8'); *// new code*
if ($cc_strlen > 2048) { /* snip */ } // do something
}
/* snip */ // do something
*#this works fine as long as the user only submits single byte charachters,
but with UTF-8 the whole thing changes ..*
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
<html xmlns="http://www.w3.org/1999/xhtml";>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>test</title>
</head>
<body>
<p>You submitted <?php echo $cc_strlen; ?> characters (STRLEN).</p>
<p>You submitted <?php echo $cc_mb; ?> characters (MB_STRLEN).</p>
<p>Characters Left:<span id="remainder">2048</span></p>
<form action="" method="post" onsubmit="return false;" id="post_form">
<textarea id="post_text" name="text" onkeydown="check_length();"
onchange="check_length();" rows="10" cols="50">œŸŒ‡Ņ</textarea><br />
<input type="submit" value="Submit" id="post_button"
onclick="submit_form();" />
</form>
<script type="text/javascript">
<!--
var the_form = document.getElementById('post_form');
var textarea = document.getElementById('post_text');
var counter = document.getElementById('remainder');
function check_length() {
var remainder = 2048 - textarea.value.length;
var length_alert = false;
if (remainder < 0) {
remainder = 0;
for (var count = textarea.value.length; (count >= 2048); (count -= 1)) {
textarea.value = textarea.value.substr(0, 2047);
counter.style.color = 'red'
length_alert = true;
}
}
if (length_alert) alert('You are already using 2048 characters.');
if (document.all) {
counter.innerText = remainder;
} else {
counter.textContent = remainder;
}
}
function submit_form() {
check_length();
the_form.submit();
alert ('You submitted ' + textarea.value.length + ' characters');
return true;
}
-->
</script>
<?php
*# Now as soon as one is starting to submit UTF-8 characters strlen is not
working proberly any more
# So we had to work through thousands of lines of code, replacing strlen()
with mb_strlen();
# We also found mb_strlen to take about 8 times longer than strlen().*
$s_t = microtime();
mb_strlen('œŸŒ‡Ņ', 'UTF-8');
$e_t = microtime();
echo '<p>MB_STRLEN took : '.(($e_t - $s_t)*1000).' milliseconds</p>';
$s_t = microtime();
strlen('œŸŒ‡Ņ');
$e_t = microtime();
echo '<p>STRLEN took : '.(($e_t - $s_t)*1000).' milliseconds</p>';
*# So much for internationalisation.
# Just writing this as a reminder for everyone who is facing similar
situations.*
?>
</body>
</html>
