how can i restrict the first character in PHP string?

[cyberlei]

like user have to type "A" for the first character in the blank bar,so how can i restrict the "A" for the first character in php string?

Thank you

[pbmods]

Heya, Cyberlei. Welcome to TSDN!

Something like this?

$str[0] = 'A';
 

[cyberlei]

Heya, Cyberlei. Welcome to TSDN!

Something like this?

$str[0] = 'A';
 

something like this:

 if($sn<>"" $str[0] = 'A';)
    {
        $q = "update remotestatus set step=8 where ip='$ip'";
        mysql_query($q)or die(mysql_error()) ;
        $step=8;
    }
    else
    $message="Number Must Be Start With A";
        }
 

[bergy]

This should work

[php]
if(substr($str, 0, 1) == "A"){
//string okay
}else{
//string not okay :(
}
[/php]

[cyberlei]

This should work

[php]
if(substr($str, 0, 1) == "A"){
//string okay
}else{
//string not okay :(
}
[/php]

Working well.

Thanks a lot