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up vote 1 down vote favorite

Hopefully this is a simple answer or doable in some other way. I want to use parse_str to store my querystring values in an array. 

$querystring = "value1=SKIP&value2=SKIP&value3=GET&value4=GET";
parse_str($querystring, $fields);

Accessing the data by name works correctly:

echo $fields['value3'];

... but accessing via index does not:

echo $fields[2];

The reason I want to access by index instead of name is because after the 2nd array value, the rest of the querystring parameters will be DYNAMICALLY generated. In other words, for the processing I'm doing -- I want to get all parameters AFTER the 2nd one. To do that, I was going to use a simple FOR loop starting from the 3rd value in the array to the sizeof(myArray);.

Any ideas how I can accomplish this?

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4 Answers

up vote 5 down vote accepted

You have to generate an indexed array then. You could for example use:

$indexed = array_values($fields);
print $indexed[2];  // eqivalent to $fields["value3"];

Note that the index starts from 0.

If you want you could also combine the named array with the indexed version:

$fields = array_merge($fields, array_values($fields));
$fields[2] == $fields["value3"];
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Exactly what I needed. Thanks! –  tresstylez Feb 1 '11 at 21:47
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up vote 0 down vote 
$i = 0;
foreach ($fields as $key => $value) {
    $fields[$i] = $value; //or just put your code here, and use $i
    $i++;
}

for ($j = 2; $j < $i; $j++) {
    //do something with $fields[$j]
}
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up vote 0 down vote

Here:

$querystring = "value1=SKIP&value2=SKIP&value3=GET&value4=GET";
parse_str($querystring, $fields);
$arr = array_slice($fields, 2, count($fields), true);

foreach($arr as $key=>$value) {
        echo $key . "=>" . $value;
}
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up vote 0 down vote

Just concatenate a string with an integer:

echo $fields["value" . $myInteger + 1];

where myInteger is your value (for loop, etc.). You need to add 1 because your strings are one-based.

Example:

for ($i = 2; $i < sizeof($myArray); $i++)
{
    echo $fields["value" . $i + 1];
}
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You forgot $ before the variable names. –  ThiefMaster♦ Feb 1 '11 at 21:42
    
@ThiefMaster: Thanks. I come from a C background and work in countless other languages. Fixed. –  Evan Mulawski Feb 1 '11 at 21:44
    
Now remove the int –  ThiefMaster♦ Feb 1 '11 at 21:47
    
Whats the point of this? I don't understand on how combining a named numeric key hybrid is beneficial. –  John Cartwright Feb 1 '11 at 21:49
    
@John: Simplicity. The OP is already using a for loop for traversal and as long as the keys have the same prefix, it is simple to access each one. –  Evan Mulawski Feb 1 '11 at 21:51
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