Parsing in PHP 1

[pegazaus]

Hi

I need to know how to parse a String in PHP.
Exemple when a use enters his/her name, I need a function that checks if the user did type some nonalphabethical characters.

 

[Olavxxx]

parsing:
echo $variablename;

http://no2.php.net/is_int

Olav Alexander Mjelde

http://www.volvo-power.net

Admin & Webmaster

 

[sleipnir214]

What kind of non-alphabetical characters?

Generally, numbers are not part of a name. But apostrophes, spaces, dashes, periods and commas can.

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[Olavxxx]

I never bother checking names too strict, as I think of it like this:

if they want to fake it, they will!
sure, you can block them from calling themselves:
bobby19

but, they can use the name:
AkajUjajasdIAkdk AKjajsah

you have no way to check if they input real data, or if they pretend to be george bush..

I think email validation is the only really important thing for me, and this is why I think email activation link might be a good thing.

Olav Alexander Mjelde

http://www.volvo-power.net

Admin & Webmaster

 

[pegazaus]

Hi again

I'll explain more. what I'm really after is how to go through a string and check it char pre char.
Example in C language you can use a silly way to check if the user typed nonalphabethical chars in his/her name.

 for(i=0;i<strlen(name);i++){
   if((char[i]<'a' ||char[i]>'z')&&(char[i]<'A' ||char[i]>'Z')){
   return falss;
 }
  return true;
 }

Yes it's true that a user can use false name and apostrophes, spaces, dashes, periods and commas and so on. This can be fixed later. What I'm really after is to kown if there is a similar mechanisme in PHP so I can learn how to use it.
So the Question is how to go through a string and check the characters one by one can compare them to ASCII?

 

[sleipnir214]

PHP's grammar is based very closely on PHP's.

Taking into account that all PHP variable names must begin with "$" (

http://www.php.net/manual/en/language.variables.php),

PHP strings may be referenced as character arrays (

http://www.php.net/manual/en/language.types.string.php),

and strlen() does the samething in PHP as it will in your code (

http://us3.php.net/manual/en/function.strlen.php)

then this code:

for($i=0;$i<strlen($name);$i++)
{
   if(($char[i]<'a' ||$char[i]>'z')&&($char[i]<'A' ||$char[i]>'Z'))
   {
   return FALSE;
   }
  return TRUE;
}

is well-formed PHP code.


PHP also provides functionality such as regular expression engines that would allow the above to be done without the loop.

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