Check if a value is present in an array

Question

I have a table in my database with several numbers. I take the numbers from the database, store them in a array, and do echo in a PHP table:

echo "<table class='CSSTableGenerator'>";

echo "<tr>";

echo "<th>array</th>";

echo "<th>1</th>";
echo "<th>2</th>";
echo "<th>3</th>";
echo "<th>4</th>";
echo "<th>5</th>";
echo "<th>6</th>";
echo "<th>7</th>";
echo "<th>8</th>";
echo "<th>9</th>";
echo "<th>10</th>";
echo "<th>11</th>";
echo "<th>12</th>";
echo "<th>13</th>";
echo "<th>14</th>";
echo "<th>15</th>";
echo "<th>16</th>";
echo "<th>17</th>";
echo "<th>18</th>";
echo "<th>19</th>";
echo "<th>20</th>";
echo "<th>21</th>";
echo "<th>22</th>";
echo "<th>23</th>";
echo "<th>24</th>";
echo "<th>25</th>";
echo "<th>26</th>";
echo "<th>27</th>";
echo "<th>28</th>";
echo "<th>29</th>";
echo "<th>30</th>";

echo "</tr>";

while ($produto = mysql_fetch_array($produtos)) {
    $vetor=array($produto['id'],$produto['n1'],$produto['n2'],$produto['n3'],$produto['n4'],$produto['n5'],$produto['e1'],$produto['e2']);

    echo "<tr>";

    echo "<td>".$vetor[1]."&nbsp";
    echo $vetor[2]."&nbsp";
    echo $vetor[3]."&nbsp";
    echo $vetor[4]."&nbsp";
    echo $vetor[5]."&nbsp";
    echo $vetor[6]."&nbsp";
    echo $vetor[7] . "</td>&nbsp";


    for ($i = 1; $i <= 30; $i++) {
        echo '<td class="'.(($vetor[1]==$i) ? 'paint_me_green' : 'paint_me_red').'"></td>';

    }

    echo "</tr>";

}

echo "</table>";

?>

The numbers (array) are written in the column <th>array<th> and the others <th>1 until 50 <th> I’d like to check if the numbers contained in one of my arrays ex: array 10 12 23 10 223. If number 10 exists in this array to <th>10</th> will be green in the line of this array, otherwise red.

So far as you can see in my code, inside the while and put a for

for ($i = 1; $i <= 50; $i++) {
    echo '<td class="'.(($vetor[1]==$i) ? 'paint_me_green' : 'paint_me_red').'"></td>';
}

but this way he’s just checking whether:

• heading [1] == 1 he paints green if he does not paint red.
• heading [1] == 2 he paints green if he does not paint red.
• ...
• heading [1] == 23 he paints green if he does not paint red.

And it works this way... that’s what I want. I just want to do the same for the other positions beyond the position [1].

The for which I am using, should not be the most correct way of analysing the remaining positions.

It would be something like this I would need:

for ($i = 1; $i <= 50; $i++) {
    echo '<td class="'.(($vetor[1]==$i) and ($vetor[2]==$i) and ($vetor[3]==$i) and ($vetor[4]==$i) and and ($vetor[5]==$i) and ($vetor[7]==$i) ? 'paint_me_green' : 'paint_me_red').'"></td>';
}

They told me about the foreach ($array_de_arrays ... I just can’t apply.

Answer 1

You need the function in_array().

for ($i = 1; $i <= 50; $i++) {
    echo '<td class="'.(in_array($i, $vetor) ? 'paint_me_green' : 'paint_me_red').'"></td>';
}

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.