php - Conditional Logic Form Validation -

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i'm having issues writing logic script. can't seem wrap head around it.

i have form contains 6 quantity fields, , 2 corresponding check boxes each quantity field.

quantity fields referenced in variables $q1, $q2, $q3, $q4, $q5, $q6. check boxes referenced in variables $c1_1, $c1_2, $c2_1, $c2_2... etc.

the logic want achieve is, if input number quantity field, either 1 of 2 corresponding checkboxes must checked or form invalidates.

my current code looks this:

if(    ($q1 !== "" && ($c1_1 == "" || $c1_2 == "")) ||    ($q2 !== "" && ($c2_1 == "" || $c2_2 == "")) ||    ($q3 !== "" && ($c3_1 == "" || $c3_2 == "")) ||    ($q4 !== "" && ($c4_1 == "" || $c4_2 == "")) ||    ($q5 !== "" && ($c5_1 == "" || $c5_2 == "")) ||    ($q6 !== "" && ($c6_1 == "" || $c6_2 == "")) ) {    $is_valid = false; } else {    $is_valid = true; }

what's wrong code when go test script, requires both checkboxes checked validate.

if understood correctly, want invalidate if meet 1 of this:

  • a field empty
  • both checkboxes (belonging field) unchecked

so be

if(    ($q1 !== "" && ($c1_1 == "" && $c1_2 == "")) ||    ($q2 !== "" && ($c2_1 == "" && $c2_2 == "")) ||    ($q3 !== "" && ($c3_1 == "" && $c3_2 == "")) ||    ($q4 !== "" && ($c4_1 == "" && $c4_2 == "")) ||    ($q5 !== "" && ($c5_1 == "" && $c5_2 == "")) ||    ($q6 !== "" && ($c6_1 == "" && $c6_2 == "")) ) {    $is_valid = false; } else {    $is_valid = true; }

with or without inner ().

haven't tried myself, should work.


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