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<?php
 
$a=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
$count = count($a);
 
for($i = 1; $i <= $count; $i += 2) {
  unset($a[$i]);
}
 
print_r($a);

Success #stdin #stdout 0.01s 24416KB

stdin

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Standard input is empty

stdout

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Array
(
    [0] => 1
    [2] => 3
    [4] => 5
    [6] => 7
    [8] => 9
)

https://ideone.com/VtTdWR

language:

PHP (php 7.3.5)

created:

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public

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