说明
Makes a binary diff of two strings and returns the result. This function works with both text and binary data. Resulting patch can be later applied using xdiff_string_bpatch()/xdiff_file_bpatch().
Starting with version 1.5.0 this function is an alias of xdiff_string_bdiff().
参数
old_data- 
      
First string with binary data. It acts as "old" data.
 new_data- 
      
Second string with binary data. It acts as "new" data.
 
返回值
   Returns string with result or false if an internal error happened.
  
参见
- xdiff_string_bdiff() - Make binary diff of two strings
 - xdiff_string_bpatch() - Patch a string with a binary diff
 
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