modify php variable name dynamically

Question

I want to do something like this, but smarter.

$armor = $row['armor'];
$elemental_armor = $row['elemental_armor'];
...
$unlock_field=mysql_result($wiki_result_set,$i,"unlock_field");

if ($unlock_field == "armor"){
    $wiki_armor = $armor;
} else if ($unlock_field == "elemental_armor"){
    $wiki_elemental_armor = $elemental_armor;
}

Is something like this possible?

$wiki_{$unlock_field} = {$unlock_field};

Sorry for the potentially simple question. I am admittedly a php novice.

You can, but it's a very bad practice. Use for example arrays instead. — Gerifield
– Gerifield, Commented Dec 24, 2014 at 20:57
My code did not work when I tried it. Can you fix my syntax/advise? Thanks. — KisnardOnline
– KisnardOnline, Commented Dec 24, 2014 at 20:57

dynamic · Accepted Answer · 2014-12-24 21:00:37Z

2

$var = "wiki_{$unlock_field}";
$$var = $unlock_field;

answered Dec 24, 2014 at 21:00

dynamic

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6 Comments

mario Over a year ago

$answer .= "text" ? +1 : -1

dynamic Over a year ago

sure an array is way better solution, but he asked how to do var variable

KisnardOnline Over a year ago

I +1ed you as they are saying the array way is better, so I will trust the wisdom. I admittedly, don't know which way is best, or what I was asking for :D

mario Over a year ago

@KisnardOnline Your entire code doesn't know what it's doing. I suspect a trivial extract with prefixing or using a saner database interface would remove 20 lines of it.

KisnardOnline Over a year ago

I am making a wiki that in game players randomly unlock. In this case monster page. It needs to store the values for the monster, and then only show them when another table has an entry.

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Iram · Accepted Answer · 2014-12-24 21:05:00Z

1

You can make $wiki_ as an array variable.

$armor = $row['armor'];
$elemental_armor = $row['elemental_armor'];
...
$unlock_field=mysql_result($wiki_result_set,$i,"unlock_field");
$wiki_[$unlock_field] = $row[$unlock_field];

answered Dec 24, 2014 at 21:05

Iram

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Comments

prodigitalson · Accepted Answer · 2014-12-24 21:10:23Z

1

There is no reason to do this. You should use an array instead... it just makes more sense.

$wiki = array();
$unlock_field= mysql_result($wiki_result_set,$i,"unlock_field");

$wiki[$unlock_field] = $row['$unlock_field'];

answered Dec 24, 2014 at 21:10

prodigitalson

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