?php
$array = array("php", 11, '', 12, "脚本之家",13,"green",2021,"mysql","14",15);
function filter_number($value){
    if(is_numeric($value)){
        return TRUE;
    }
}
$result=array_filter($array,"filter_number");
var_dump($result);
?>

?php  
print_r($r+e); // 输出span style="font-family: Simsun;font-size:16px; ">Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 ) /span>  
print "br />";  
print_r(array_merge($r,$e)); // 输出span style="font-family: Simsun;font-size:16px; ">Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 [7] => 8 [8] => 9 )/span>  
?>