I am a beginner to ask questions about the if statement in a function.

Ask a question about the if statement in a function. if a similar function exists in Cainiao, it is incomplete. just give an example of function & nbsp; p_abc ($ a = '', $ B = '', $ c ='') {& nbsp; $ a = & nbsp; xxx & n asked a question about the if statement in a function. I am a newbie.
If there are similar functions that are incomplete, just give an example.

Function p_abc ($ a = '', $ B ='', $ c = ''){
$ A = xxx
If ($ B = '000000 '){
$ A = xxx + 1
}
$ C = yyy

}


When $ B = '000000', the function can run normally. when $ B is not equal to 255, it seems that $ c = yyy cannot be executed (I'm not sure ). Cause program errors.

Why? I am a newbie, please tell me.



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