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                                     trim

   (PHP 3, PHP 4 )
   trim --  Strip whitespace from the beginning and end of a string

Description

   string trim ( string str [, string charlist])

     Note: The optional charlist parameter was added in PHP 4.1.0

   This function returns a string with whitespace stripped from the
   beginning and end of str. Without the second parameter, trim() will
   strip these characters:

     * " " (ASCII 32 (0x20)), an ordinary space.
     * "\t" (ASCII 9 (0x09)), a tab.
     * "\n" (ASCII 10 (0x0A)), a new line (line feed).
     * "\r" (ASCII 13 (0x0D)), a carriage return.
     * "\0" (ASCII 0 (0x00)), the NUL-byte.
     * "\x0B" (ASCII 11 (0x0B)), a vertical tab.

   You can also specify the characters you want to strip, by means of the
   charlist parameter. Simply list all characters that you want to be
   stripped. With .. you can specify a range of characters.

   Example 1. Usage example of trim()

   <?php
   $text = "\t\tThese are a few words :) ...  ";
   $trimmed = trim($text);
   // $trimmed = "These are a few words :) ..."
   $trimmed = trim($text, " \t.");
   // $trimmed = "These are a few words :)"
   $clean = trim($binary, "\0x00..\0x1F");
   // trim the ASCII control characters at the beginning and end of
   $binary
   // (from 0 to 31 inclusive)
   ?>

   See also ltrim() and rtrim().
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