How does PHPstorm xdebug automatically breakpoint each line? ? ?

xdubg+phpstorm debugging, the framework’s entrance index.php starts from the first line, and each line has automatic breakpoints.
Instead of setting a breakpoint where I set a breakpoint.
What's going on?

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xdubg+phpstorm debugging, the framework’s entrance index.php starts from the first line, and each line has automatic breakpoints.
Instead of setting a breakpoint where I set a breakpoint.
What's going on?

Are you single-step debugging

After entering debugging, F7 or F8