in_array函数总是返回false

Question

I have an array and when using in_array to check if object exists it always returns false.

As an example, here is the array:

array:1 [
0 => "name1, name2, name3"
]

and this is how I check if index exists

if(!in_array('name1', $array)) { return FALSE; } else { return TRUE;}

Name1 exists in array I have however I think I'm missing something small here.

Not sure what it could be or even if this function is the right function to use to check? Expected result is to be true as object exists.

Thanks

Answer 1

Since your array only has one item with a long string in_array returns false since there is no exact match.
What you can do is to use preg_grep which is regex for arrays.

var_dump(preg_grep("/name1/i", $arr));

https://3v4l.org/dmvsR

You can use it with bool return like this:

if(preg_grep("/name1/i", $arr)){
    echo "true";
}else{
    echo "false";
}

Since preg_grep returns empty if nothing is found.
And empty array means false in an if().