php backslash find and replace -

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I am trying to do a simple search and am changing it within a string:

< Pre> $ Share_name = str_replace ("", "\", $ share_name); Unfortunately for some reason it replaces all the spaces with "\\" instead of "\" instead of "\". Does anyone know what is going on and how to solve this problem?

I think you mean: 

  $ share_name = Str_replace ("", "\\", $ share_name);

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