通过添加一个直到找到针头在大海捞针中找到针头

Question

I have this array of random numbers created by a table in database

$numbersArr = array(3,5,17,19,24,30,38,...)
$userInput = 35;

So far this is what I have

if (in_array($userInput, $numbersArr)){

 echo 'found needle';

}else{

//add one to the $userInput until find a needle

}

So the program would add 1 to 35 until it found 38, then stop. How can I do this? I'm pretty sure it's straightforward but I cant wrap my head around it.

Answer 1

There is no need for looping.
You can filter the array, and echo min number.

$numbersArr = array(3,5,17,19,24,30,38,12,15,21,67);
$userInput = 35;

// Filter array, return values larger than user input
$filtered = array_filter($numbersArr,
    function ($value) use($userInput) {
        return $value >= $userInput;
    }
);
If(count($filtered)>0){
    // Echo smallest number in array
    Echo min($filtered);
}else{
    Echo "no number larger than user input";
}

Try it here: https://3v4l.org/fMg7K