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@ 2017-12-03T14:11:14Z

<?php

$urlParams = [
    'searchQuery' => 'search!!',
    'in1'=> 'iddoc', 
    'in2'=> 'iddoc2', 
    'in3'=> 'iddoc3', 
    'in4'=> 'iddoc4',
    'in5'=> '',
];

echo http_build_query(array_filter($urlParams));

Output
Performance
VLD
References
Branches

array_filter: documentation ( source)
http_build_query: documentation ( source)

preferences:dark modelive preview

55.59 ms | 402 KiB | 5 Q