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<?php $week = "Monday,Tuesday,Wednesay,Thursday,Friday,Saturday,Sunday"; $preg = "/([^,]+),([^,]+)$/"; preg_match($preg, $week, $match); print_r($match);
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [0] => Saturday,Sunday [1] => Saturday [2] => Sunday )

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191.3 ms | 404 KiB | 253 Q