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<?php $str = 'Date,Location,Data1,Data2,Data3,$787 - $456 - $875,6.08 - 15.52,30.46,5,5,Name,LastName,42.71'; $str = preg_replace('/,(?=(?:[^,]*,){5}[^,]*$)/', ' - ', $str); echo $str;
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
Date,Location,Data1,Data2,Data3,$787 - $456 - $875,6.08 - 15.52 - 30.46,5,5,Name,LastName,42.71

preferences:
141.22 ms | 407 KiB | 5 Q