PHP/String/trim

Checking the length of a trimmed string

   <source lang="html4strict">

<?

   $zipcode = trim("12344");
   $zip_length = strlen($zipcode);
   if ($zip_length != 5) {
       print "Please enter a ZIP code that is 5 characters long.";
   }

?>

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Combining trim() and strlen()

   <source lang="html4strict">

if (strlen(trim($_POST["name"])) == 0) {

   $errors[] = "Your name is required.";

}

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string trim ( string str [, string trim_chars] ) strips spaces, new lines, and tabs

   <source lang="html4strict">

<?

   $a = trim(" testing ");
   $b = trim(" testing ", " teng");

?>

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trim() function removes all whitespace from both sides of string

   <source lang="html4strict">

Its syntax is: string trim (string string) It will also remove the special characters "\n", "\r", "\t", "\v" and "\0". <? print ">".trim(" asdf ")."<"; ?>

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