key and value array access in php

Question

I am calling a function like:

get(array('id_person' => $person, 'ot' => $ot  ));

In function How can I access the key and value as they are variable?

function get($where=array()) {

  echo where[0];
  echo where[1];
}

How to extract 'id_person' => $person, 'ot' => $ot without using foreach as I know how many key-values pairs I have inside function?

You need to elaborate on your usage and input variance. If you want to turn the array into an indexed version, use array_values() and then $where[0] etc. (= generally not advisable). — mario
– mario, Commented Mar 28, 2013 at 1:31

kero · Accepted Answer · 2013-03-28 01:22:48Z

1

You can access them via $where['id_person'] / $where['ot'] if you know that they will always have these keys.

If you want to access the first and second element, you can do it like this

reset($where)
$first = current($where);
$second = next($where);

answered Mar 28, 2013 at 1:22

kero

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6 Comments

edgarmtze Over a year ago

so $where['id_person'] , where[0], $where['ot'], where[1] Is it correct

kero Over a year ago

You always pass arrays that have the keys id_person and ot? Then you can do it this way

nickb Over a year ago

@cMinor - Your array is not numerically indexed, so you can't do $where[0]. You can only do $where['id_person'] to get the first element in the array.

Erica Xu Over a year ago

In php array is actually a dictionary. If you don't specify names like id_person and ot, you can access things using the standard zero-based indexing, that's the default. But using key-value pairs is easier to understand in most cases.

edgarmtze Over a year ago

so I understand to get value of 'id_person' I do $where['id_person'], but to know the string it self 'id_person'?

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jszobody · Accepted Answer · 2013-03-28 01:24:24Z

1

Couple ways. If you know what keys to expect, you can directly address $where['id_person']; Or you can extract them as local variables:

function get($where=array()) {
   extract($where);
   echo $id_person;
}

If you don't know what to expect, just loop through them:

foreach($where AS $key => $value) {
    echo "I found $key which is $value!";
}

answered Mar 28, 2013 at 1:24

jszobody

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3 Comments

edgarmtze Over a year ago

If all of them can be variables, How would I access them, Is a foreach loop the only way out?

jszobody Over a year ago

Not sure what you mean. If they are 'variable' in that you don't know what keys will be passed in, foreach is the best way to find out.

jszobody Over a year ago

If you want to avoid foreach() so that you can restrict how many keys are allowed, just check that first. if(count($where) > 4) return "too many"; I still think you'll find foreach() the best way to figure out what keys you received.

Erica Xu · Accepted Answer · 2013-03-28 01:23:40Z

0

Just do $where['id_person'] and $where['ot'] like you do in JavaScript.

answered Mar 28, 2013 at 1:23

Erica Xu

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Comments

sectus · Accepted Answer · 2013-03-28 01:28:34Z

0

If you do not care about keys and want to use array as ordered array you can shift it.

function get($where=array()) {
$value1 = array_shift($where);
$value2 = array_shift($where);
}

answered Mar 28, 2013 at 1:28

sectus

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