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Editorial Team
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Asked: 2026-06-07T21:58:01+00:00

<input type=checkbox id=one name=form[age[]] value=1/><label for=one>0 to 12 months</label> How do I reference the

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<input type="checkbox" id="one" name="form[age[]]" value="1"/><label for="one">0 to 12 months</label>

How do I reference the name in PHP once it has been submitted using POST. I am trying to collect all the checkbox values and then implode age[], but I need to put this in a form[] for form validation.

When i print_r[$_POST['form']['age'], it displays Notice: Undefined index: age

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1 Answer

  1. Editorial Team

    You should use name="form[age][]" for every checkbox with age value, and then after you send those values to PHP they will be available as an array $_POST[‘form’][‘age’].

    Example:

    <input type="checkbox" name="form[age][]" value="1"/>
<input type="checkbox" name="form[age][]" value="2"/>
<input type="checkbox" name="form[age][]" value="3"/>

    will result an array in PHP like:

    $_POST['form']['age'][0]; // = 1
$_POST['form']['age'][1]; // = 2
$_POST['form']['age'][2]; // = 3
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