php - Undefined index errors when using plus equal operator -


I am working on other developers old codes and there are many notifications: Unspecified index errors while using data + = operator The index is not necessarily set up so far, so that the error arises.

Example: 

  $ myArray = array (); $ MyValue = 1; For {$ myArray ['test'] + = 1; ($ I = 1; $ i & lt; = 10; $ i ++) }   
 An error will occur on the first run because the trial index is not set up yet.  
 I know that I can remove this error from the following code:    $ myArray = array (); $ MyValue = 1; ($ I = 1; $ i & lt; = 10; $ i ++) {If ($ MyArray ['test'])) {$ myArray ['test'] = $ myValue; } And {$ myArray ['test'] + = $ myValue; }}   
 However, there are about 50 things to change in this way. Do all these issuing statements deserve to be written or do not I know better?  
 Edit: I should note that array indexes are not always equal and sometimes are not set, so I can not predict the pointer to avoid error in this situation.  
 
 It is a little small, but if you have a lot of edits, then maybe a bit complicated.  
  $ MyArray = array (); $ MyValue = 1; {Isset ($ myArray ['test']) for ($ I = 1; $ i & lt; = 10; $ i ++)? $ MyArray ['test'] + = $ myValue: $ myArray ['test'] = $ myValue; }   
 You can also type a global function (not tested).  
  $ myArray = array (); $ MyValue = 1; {Increment ($ myArray ['test'], $ myValue for $ i = 1; $ i & lt; = 10; $ i ++); } Function increment (& $ var, $ inc) {$ var = isset ($ var)? $ Var + = $ inc: $ var = $ inc}

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