PHP, how can I produce a list of unique numbers?

I have some numbers which will be part of an sql query, like this...

152258, 152258, 152258, 152258, 152261, 152261, 152261, 152261, 152261, 152270, 
152270, 152270, 152287, 152287, 152287, 152287

M开发者_开发问答y query is quite complex and the list is quite long and I need to produce a unique list of numbers, can I do this with a regex?

If not how ?

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Here is how you can make your string have unique numbers: http://codepad.org/cziNtZOS

<?php

$myString = "152258,152258,152258,152258,152261,152261,152261,152261,152261,152270,152270,152270,152287,152287,152287,152287";
$array = explode(",",$myString);
$unique = array_unique ( $array  );
$myUniqueString = implode(",",$unique);
echo $myUniqueString ;
?>

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I was going to write a function for you, turns out PHP has one already: array_unique()

Edit: in any case, this is one of the alternative ways of doing it:

function uniquify_array($a)
{
    $b = array();  // I wish I could write just $b = {};
    foreach ($a as $i)
        $b[$i] = $i;
    return $b;
}

Note that this function works only with values, whereas the built-in array_unique() preserves the keys in the original array.

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Generate some set of numbers and then just use array_unique function

$nums = array();

for ($i = 0; $i < $limit; $i++) { $nums[] = rand() * 10000;

$nums = array_unique($nums);

}

Sultan

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If you want a range of numbers use PHP's range() method

If you want a unique list of numbers, you can use PHP's rand() method

range() : http://php.net/manual/en/function.range.php

rand() : http://php.net/manual/en/function.rand.php

EDIT And as @RobertPitt points out, uniqid can be used for generating IDs as well : http://php.net/manual/en/function.uniqid.php

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USE RANGE()

REFERENCE