php利用in_array和array_search函数检测数组中是否包含某字符串

<?php
header("Content-type:text/html;charset=utf-8");
$array = array(
    'name'  =>'web前端建站',
    'url'   =>'https://ipkd.cn/',
    'title' =>'PHP教程',
    'pid'   =>1001
);
var_dump($array);
if(in_array('PHP教程', $array, true)){
    echo '数组中包含字符串“PHP教程”

';
}else{
    echo '数组中不包含字符串“PHP教程”

';
}
if(in_array('1001', $array, true)){
    echo '数组中包含字符串“1001”

';
}else{
    echo '数组中不包含字符串“1001”

';
}
?>

<?php
header("Content-type:text/html;charset=utf-8");
$array = array(
    'name'  =>'web前端建站',
    'url'   =>'https://ipkd.cn/',
    'title' =>'PHP教程',
    'pid'   =>1001,
    'level' => 1111,
);
var_dump($array);
var_dump(array_search('1001', $array, true));
var_dump(array_search('PHP教程', $array));
var_dump(array_search('1111', $array, true));
var_dump(array_search(1111, $array, true));
?>