PHP beginners, verification code problems

A beginner in PHP, has an open-source code study on the verification code. if you have any questions about the verification code, please refer to the following error code: errID: 2 errStr: imagettftext () [function. imagettftext]: ProblemloadingglypherrFile: IWEB_PATH/cor PHP beginner, verification code problems
I have studied the open source code and encountered a verification code problem. For more information, see the following error code:

ErrID: 2
ErrStr: imagettftext () [function. imagettftext]: Problem loading glyph
ErrFile: IWEB_PATH/core \ util \ captcha_class.php
ErrLine: 256
ErrTime: 11-09-22 14:38:21
# Variable value when an error occurs :##
Array (
'Text' => 'nuheb ',
'Fontcfg '=>
Array (
'Spacing' => 2,
'Minsize' => 22,
'Maxsize' => 24,
'Font' => 'font. ttf ',
),
'Fontfile' => 'E: \ php \ lib \ core \ util/font. ttf ',
'Lettersmissing' => 0,
'Fontsizefactor '=> 1,
'X' => 60,
'Y' => 91,
'Length' => 5,
'I' => 0,
'Gree' =>-5,
'Fontsize' => 78,
'Letter' => 'N ',
)
-------

------ Solution --------------------
Show me the code ~
------ Solution --------------------
Discussion
Show me the code ~

------ Solution --------------------
ErrID: 2
ErrStr: imagettftext () [function. imagettftext]: Problem loading glyph
ErrFile: IWEB_PATH/core \ util \ captcha_class.php
ErrLine: 256
ErrTime: 11-09-22 14:38:21

Is this error record an open source code debugging function?
The prompt is clear:
The error code returned by row 256th in the file captcha_class.php. The imagetfrtext () function is incorrect. it should be a character File loading error.


------ Solution --------------------
The imagetfrtext () function is incorrect and cannot load the string! You are checking that function
------ Solution --------------------
Discussion

The imagetfrtext () function is incorrect and cannot load the string! You are checking that function

------ Solution --------------------
The font file does not exist.