Description:
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---
From manual page: https://php.net/function.ob-start
---

Prototype found under the "output_callback" parameter's description is invalid.
Return type differs.
English version " : string" ; French version " : bool"
" : string" is the correct one, for it is the new value of "string $buffer"

This is a very minor issue but I lost a few minutes so it might help others.

Thank you.

Test script:
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handler ( string $buffer [, int $phase ] ) : string /* English version: https://www.php.net/manual/en/function.ob-start.php */

handler ( string $buffer [, int $phase ] ) : bool /* French version: https://www.php.net/manual/fr/function.ob-start.php */ 

Expected result:
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handler ( string $buffer [, int $phase ] ) : string


Actual result:
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handler ( string $buffer [, int $phase ] ) : bool