PHP - How To Find A Character In A Variable

All,
I have a zip code and for example the zip code is 01101. How can I determine if the first character in this is a zero?

Thanks in advance.

all i want is for when their is a _ to be replaced with a space so i tried these and neither worked
Code: [Select]
<?php
$pmod = str_replace("_"," ",$p);
$pmod = preg_replace("_"," ",$p);
?>
so i was wondering if because this was in a while statement, is this the reason its not working, and if so how should i fix it (this is the while)
Code: [Select]
<?php
while ($z <= $w){
$p = $multi[$z];
        $pmod = str_replace("_"," ",$p);
echo "<a href='tag.php?tag=$p'" . $p . ">" . $pmod . "</a> ";
$z++;
}
?>

I got another problem. It is a counting characters.
When I reload text from database, I want to count how many characters are in text. The problem is that I use the timymce, and there is a tags </p> and formats <span> and other formats. How can I count characters without those format, just pure characters entire text? I need a php code. And some plus - text is in utf8 coding in database with utf8 bin.

Thanks to the advice of others on PHPFreaks, I have decided that allowing any character for certain fields on my "Add an Article" form.  However, I still want to define a length between 2 and 100.

How do I re-write my RegEx to accomplish this?

Befo
Code: [Select]
// Check HTML Title.
if (empty($trimmed['htmlTitle'])){
$errors['htmlTitle'] = 'Please enter an HTML Title.';
}else{
if (preg_match('#^[A-Z \'.-]{2,100}$#i', $trimmed['htmlTitle'])){
$htmlTitle = $trimmed['htmlTitle'];
}else{
$errors['htmlTitle'] = 'HTML Title must be 2-100 characters (A-Z \' . -)';
}
}


Here is my best guess...

After:
Code: [Select]
// Check HTML Title.
if (empty($trimmed['htmlTitle'])){
$errors['htmlTitle'] = 'Please enter an HTML Title.';
}else{
if (preg_match('#^[.*]{2,100}$#i', $trimmed['htmlTitle'])){
$htmlTitle = $trimmed['htmlTitle'];
}else{
$errors['htmlTitle'] = 'HTML Title must be 2-100 characters (A-Z \' . -)';
}
}


Debbie

so if I have a a string of text or something like

Code: [Select]
http://www.yahoo.com/ajhsijd908340

I can use str_replace to remove "http://" but what can I use to remove the "ajhsijd908340" if every time it is a different set of characters?

Can someone help me with this.  I think I need to use substr:

how do I only echo out everything after the period ( ".")

for example if I have "table.birthday" I want to echo: "birthday"

HI all, something that keeps bothering me is that i do not fully understand the usefullness of the \n newline character.
When i use  for testing in a string it doesn't show the effect in my browser. Only when I press view source I can see that right after the \n character the code jumps down 1 line. Does anyone know how and when to use it? I have see it with the php mail function, but i don't really understand why they use it.

If someone could enlighten me i would be very happy 

Hey,

I'm having an issue with using Wikipedia's OpenSearch API - it sometimes gives me characters in a unicode format: "\u00f1" and I would like to convert back into a correctly displayed format (in this case, n-tilde; spanish n).

Any suggestions?

I have problem, there are users with "?" character in username, and their address to profile is /profile/username/.
I have var: $username that is that username, now, how can i replace all that characters which cant open users profile..
I mean for "?" i need to put "%3F", how can i replace?
I know with str_replace, but is there any other solution like htmlencode or something like that? :S

Hi, does anybody know why I get a question mark inside a diamond shape where a pound sign should be when i retrieve data from a mysql database? I have tried using latin1_general_ci and utf8_general_ci and they both do the same, don't know whether that is anything to do with it or not? Any help would be greatly appreciated.