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<?php $offer = 'some text offer with checkboxes '; $offer.= '<input type="checkbox" name="offer100500_1_chk" id = "offer100500_1_chk" value = "1" checked = "checked"/> first chkBox'; $offer.= '<input type="checkbox" name="offer100500_2_chk" id = "offer100500_2_chk" value = "1" checked = "checked"/> second chkBox'; $offer.= '<input type="checkbox" name="offer100500_4_chk" id = "offer100500_4_chk" value = "1" checked = "checked"/> third chkBox'; $offer.= '<input type="checkbox" name="offer100500_9_chk" id = "offer100500_9_chk" value = "1" checked = "checked"/> fours chkBox'; preg_match_all('/type="checkbox".*name="([\w]+)"/', $offer, $matches, PREG_SET_ORDER); var_dump($matches);
Output for 5.6.0 - 5.6.26, 7.0.0 - 7.0.1, 7.0.3 - 7.0.20, 7.1.0 - 7.1.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { [0]=> array(2) { [0]=> string(398) "type="checkbox" name="offer100500_1_chk" id = "offer100500_1_chk" value = "1" checked = "checked"/> first chkBox<input type="checkbox" name="offer100500_2_chk" id = "offer100500_2_chk" value = "1" checked = "checked"/> second chkBox<input type="checkbox" name="offer100500_4_chk" id = "offer100500_4_chk" value = "1" checked = "checked"/> third chkBox<input type="checkbox" name="offer100500_9_chk"" [1]=> string(17) "offer100500_9_chk" } }
Output for 7.0.2

Process exited with code 137.
preferences:
219.08 ms | 401 KiB | 218 Q