chop - PHP code example

Using the PHP Function Chop

PHP has numerous built-in string functions that help you manipulate strings. These functions are useful for various purposes, such as trimming a string or converting it to uppercase. These functions also enable you to add characters at the end of a string or remove characters from the right side. The trim function is an example of a string function that eliminates white space and pre-defined characters from both sides of the string.

Similarly, the ltrim and rtrim functions are examples of string function that removes characters from the start or end of the string. The chop function, on the other hand, deletes only a set of characters from the right end of a string. This is why it is considered an alias of the rtrim function.

The chop function takes one obligatory parameter and a second optional parameter. The first parameter is the string to be trimmed. The second parameter is a set of characters that should be removed from the end of the string.

You can use a character mask or a regular expression to specify the list of characters to strip. For example, you can use the mask x0B to strip all characters that are equivalent to a vertical tab (ASCII 11).

chop example

'Error writing request to proxy server'
            );
        }

        // Read response headers only         $response = '';
        $gotStatus = false;
        while ($line = @fgets($this->socket)) {
            $gotStatus = $gotStatus || (strpos($line, 'HTTP') !== false);
            if ($gotStatus) {
                $response .= $line;
                if (!chop($line)) {
                    break;
                }
            }
        }

        // Check that the response from the proxy is 200         if (Zend_Http_Response::extractCode($response) != 200) {
            throw new Zend_Http_Client_Adapter_Exception(
                'Unable to connect to HTTPS proxy. Server response: ' . $response
            );
        }

$this->status=-100;
                return false;
            }

            if($currentHeader == "\r\n")
                break;

            // if a header begins with Location: or URI:, set the redirect             if(preg_match("/^(Location:|URI:)/i",$currentHeader))
            {
                // get URL portion of the redirect                 preg_match("/^(Location:|URI:)[ ]+(.*)/i",chop($currentHeader),$matches);
                // look for :// in the Location header to see if hostname is included                 if(!preg_match("|\:\/\/|",$matches[2]))
                {
                    // no host in the path, so prepend                     $this->_redirectaddr = $URI_PARTS["scheme"]."://".$this->host.":".$this->port;
                    // eliminate double slash                     if(!preg_match("|^/|",$matches[2]))
                            $this->_redirectaddr .= "/".$matches[2];
                    else
                            $this->_redirectaddr .= $matches[2];
                }