A verification code class. Why can't I get an image?

A verification code class, why don't you just get out of the picture? you just have nothing to worry about. you have customized a verification code generated class, but you don't know why, the picture is just a reality. Please give me some advice.

 Img_width = $ img_width; $ this-> img_height = $ img_height; $ this-> font_size = $ font_size; $ this-> line_count = $ line_count ;} // function createCodeImg () {$ this-> createGraphics (); $ this-> getChars (); $ this-> setNoiceLine (); $ x = rand (2, 5); $ arr_X_Y = array ($ x, rand (1, 3), array ($ x + $ this-> font_size, rand (), array ($ x + 2 * $ this-> font_size, rand (), array ($ x + 3 * $ this-> font_size, rand (1, 4); print_r ($ arr_X _ Y); for ($ I = 0; $ I <4; $ I ++) {$ text_color = imagecolorallocate ($ this-> img, rand (180,250 ), rand (180,250), rand (180,250); imagechar ($ this-> img, $ this-> font_size, $ arr_X_Y [$ I] [0], $ arr_X_Y [$ I] [1], $ this-> arr_char [$ I], $ text_color) ;}// create the graphic board function createGraphics () {header ("Content-type: image/png"); $ this-> img = @ imagecreatetruecolor ($ this-> img_width, $ this-> img_height) or die ("image creation failed"); // creates an image $ background_c Olor = imagecolorallocate ($ this-> img, 250,250,250); imagefill ($ this-> img, $ background_color); $ border_color = imagecolorallocate ($ this-> img, 0); // border imagerectangle ($ this-> img, $ this-> img_width, $ this-> img_height, $ border_color );} // call the noise line function setNoiceLine () {for ($ I = 0; $ I <$ this-> line_count; $ I ++) {$ x1 = rand ); // start position $ y1 = rand (2, $ this-> img_height); $ x2 = rand ($ this-> img_width-20, $ this -> Img_width-2); // end position $ y2 = rand (2, $ this-> img_height); $ line_color = imagecolorallocate ($ this-> img, rand (180,250 ), rand (180,250), rand (180,250); imageline ($ this-> img, $ x1, $ y1, $ x2, $ y2, $ line_color );}} // Generate a random string or add or subtract the character function getChars () {$ strCode = ""; if (rand (0, 1) = 1) {// string-type verification code for ($ I = 0; $ I <4; $ I ++) {$ this-> arr_char [$ I] = $ this-> str_chars [rand (0, 56)]; $ strCode. = $ this-> arr_char [$ I];} $ this-> code_res Ult = $ strCode;} else {// addition/subtraction type verification code $ first_num = rand (); $ second_num = 0; $ result = 0; $ arr_operater = array ("+ ", "-"); $ operater = $ arr_operater [rand (0, 1)]; switch ($ operater) {case "+": $ second_num = rand (0, 10 ); $ result = $ first_num + $ second_num; break; case "-": $ second_num = rand (0, $ first_num); $ result = $ first_num-$ second_num; break ;} $ this-> arr_char = array ($ first_num, $ operater, $ second_num, "="); $ this-> cod E_result = $ result ;}}$ YZM = new imageCode (65,27, 16,7); $ YZM-> createCodeImg (); echo ($ YZM-> img_width. "-----". $ YZM-> code_result); imagepng ($ YZM-> img); imagedestroy ($ YZM-> img);?>

Reply to discussion (solution)

Mu Ren

Comment out the 28 rows of print_r ($ arr_X_Y );
Comment out the echo of 91 rows ($ YZM-> img_width. "-----". $ YZM-> code_result );

Comment out the 28 rows of print_r ($ arr_X_Y );
Comment out the echo of 91 rows ($ YZM-> img_width. "-----". $ YZM-> code_result );
These two lines are tested by me and cannot be commented out.

Comment out the 28 rows of print_r ($ arr_X_Y );
Comment out the echo of 91 rows ($ YZM-> img_width. "-----". $ YZM-> code_result );
It's speechless. Why didn't it work at the time? I added these two tests. Why did you say that, after I deleted them, I did it again. I don't understand it.

Oh, sometimes the code is so amazing. check carefully to see if you can find the cause.



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