Function with in_array not working

The in_array function does not expect to receive two arrays, you can create a function to do this check.

This function below returns true if any content of $array1 exists within $array2 . I did not quite understand your logic in the question, but I believe that if it's not exactly what you want then it's a matter of adapting little to the desired result.

function VerificaConteudoArray($array1, $array2) {
    foreach ($array1 as $inner) {
        if (in_array($inner,$array2)){
            return true;
        }
    }
}

Doing such a function then you would only swap a line in your code, where you use in_array to call the new function. It would look like this:

<?php


genNumeros(10,20,5,6);


function genNumeros($min, $max, $quantity, $qtd, $somamin = false, $somamax = false)
{
    for ($i = 0; $i <= $qtd; $i++) {
        $numbers = range($min, $max);
        shuffle($numbers);
        $a = array_slice($numbers, 0, $quantity);
        asort($a);

        $x = array(14, 17);

        if (VerificaConteudoArray($x, $a)) {
            continue;
        }

        if ($somamin) {
            if (array_sum($a) < $somamin)
                continue;   
        }

        if ($somamax) {
            if (array_sum($a) > $somamax)
                continue;   
        }

        foreach ($a as $key => $o) {
            if (end(array_keys($a)) == $key) {
                $aux = '';
            } else {
                $aux = ' - ';
            }

            echo $o . $aux;    
        }
        echo '<br />';
    }
}



function VerificaConteudoArray($array1, $array2) {

    foreach ($array1 as $inner) {
        if (in_array($inner,$array2)){
            return true;
        }
    }
}


?>

Here's a Fiddle with this code running. Shot on Fiddle the 14th and 17th do not appear.

The first parameter must be the value to be searched for, and the second parameter is the array itself. in_array('valor', array('valor', 'valor1', '...')) . Notice that you are passing the array in the first parameter: $x = array(14, 17); . In your logic, if you want to look inside your array $x each element of array $a , you should test each position: $x[0] and $x[1] for your array $a : in_array($x[0], $a) and in_array($x[1], $a) .

So you should solve the problem:

function genNumeros($min, $max, $quantity, $qtd, $somamin = false, $somamax = false)
{
    for ($i = 0; $i <= $qtd; $i++) {
        $numbers = range($min, $max);
        shuffle($numbers);
        $a = array_slice($numbers, 0, $quantity);
        asort($a);

        $x = array(14, 17);

        if (in_array($x[0], $a) && in_array($x[1], $a)) {
            continue;
        }

        if ($somamin) {
            if (array_sum($a) < $somamin)
                continue;   
        }

        if ($somamax) {
            if (array_sum($a) > $somamax)
                continue;   
        }

        foreach ($a as $key => $o) {
            if (end(array_keys($a)) == $key) {
                $aux = '';
            } else {
                $aux = ' - ';
            }

            echo $o . $aux;    
        }
        echo '<br />';
    }
}

But if you want to do these dynamic values, I recommend that you create a method for this:

 function genNumeros($min, $max, $quantity, $qtd, $somamin = false, $somamax = false)
    {
        for ($i = 0; $i <= $qtd; $i++) {
            $numbers = range($min, $max);
            shuffle($numbers);
            $a = array_slice($numbers, 0, $quantity);
            asort($a);

            $x = array(14, 17);

            if (continueInArray($x, $a)) {
               continue;
            }

            if ($somamin) {
                if (array_sum($a) < $somamin)
                    continue;   
            }

            if ($somamax) {
                if (array_sum($a) > $somamax)
                    continue;   
            }

            foreach ($a as $key => $o) {
                if (end(array_keys($a)) == $key) {
                    $aux = '';
                } else {
                    $aux = ' - ';
                }

                echo $o . $aux;    
            }
            echo '<br />';
        }
    }

function continueInArray($a, $b) {
    if (is_array($a)) {
        if (count($a)) {
           foreach ($a as $value) {
              return in_array($value, $b);
           }
        }
    } else {
       return in_array($a, $b);
    }
    return false;
}