Thinkphp generated verification code does not show problem resolution

Add Ob_clean () before calling the verification code;

Code that does not display a verification code:

1. Public function Verify() {
2. $verify = new \think\verify();
3. $verify-entry();
4. }

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Modified to:

2. Public function Verify() {
6. Ob_clean();
10. $verify = new \think\verify();
12. $verify-entry();
14. }

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In this case, save and refresh again, the verification code will appear

Analysis:
1, the function of Ob_clean:
Used to discard the contents of the output buffer, if your site has many generated picture class files, then you want to access the correct, you should always clear the buffer
2, in the problematic page to view the source code, found at the end of the page there is a bunch of other code (unexplained)

From: http://www.phptalker.com/thread-471-1-1.html

Thinkphp generated verification code does not show problem resolution