在PHP数组中仅排序非零值[重复]

Question

This question already has an answer here:

• How can I sort arrays and data in PHP? 10 answers

I want to sort only those values in array which are not 0 and all 0 values key should be at bottom. so for example if our array is like this-

array
{
    [0]=>4
    [1]=>0
    [2]=>2
    [3]=>0
    [4]=>3
}

So sorted array I should get like below

array
{
    [2]=>2
    [4]=>3
    [0]=>4
    [1]=>0
    [3]=>0
}

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Answer 1

Using a custom sort function you could use:

function usortTest($a, $b) {

    if( $a == 0 ) return 1;
    if( $b == 0 ) return -1;

    return gmp_cmp($a, $b);

}

$test = array(4,0,2,0,3);
usort($test, "usortTest");

print_r($test);

May need to be refactored/improved, but the documentation should help you understand custom sort functions.