cannot access php array with index?

Question

Following is my code; i didnot get problem what's wrong with it;

$units=explode(";",$course->unitinfo);
foreach($units as $unit)
{
    $unitinfo=explode("|",$unit);
    echo'<tr>
            <td>'.$unitinfo[1].'</td>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
        </tr>';
}

Here string $course->unitinfo comes with two delimiters first is ; and contains info of one row and second delimiter is | pipe sign; first explode works fine; second explode generates error with undefined offset, if print it with print_r is shows-

Array
(
    [0] => 1
    [1] => Mechanics
    [2] => 5
    [3] => 1,2
    [4] => 3,1
)

and the problem is cant access via its index - $unitinfo[1]; where i am wrong

can you print $units array in question?

Rutunj sheladiya
– Rutunj sheladiya

2015-12-05 11:27:44 +00:00
Commented Dec 5, 2015 at 11:27 — Rutunj sheladiya
– Rutunj sheladiya, Commented Dec 5, 2015 at 11:27
var_dump($unit, $unitinfo);

u_mulder
– u_mulder

2015-12-05 11:29:23 +00:00
Commented Dec 5, 2015 at 11:29 — u_mulder
– u_mulder, Commented Dec 5, 2015 at 11:29
It does feel like unit is not an array.

TomasH
– TomasH

2015-12-05 11:56:52 +00:00
Commented Dec 5, 2015 at 11:56 — TomasH
– TomasH, Commented Dec 5, 2015 at 11:56

Oli · Accepted Answer · 2015-12-05 14:56:26Z

1

You need to check for occurence of | to avoid 'undefined offset' warnings in your script:

$testString = 'test|1;test|2;test3';

$units=explode(";",$testString);
foreach($units as $unit)
{
    $value = '';
    if (strpos($unit, '|') !== false) {
        $unitinfo=explode("|",$unit);
        $value = $unitinfo[1];
    } else {
        $value='No pipe found';
    }


    echo'<tr>
            <td>'.$value.'</td>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
        </tr>';
}

Will show:

1 2 No pipe found

answered Dec 5, 2015 at 14:56

Oli

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