How do I pass two variables to the onclick parameter?

Question

if I put only one variable works, but I also need to pass $city to the onclick, but I don’t know how to concatenate in the right way. (deleteVaga function)

 while($registros = $querySelect->fetch_assoc()){
       $id = $registros['id'];
       $cidade = $registros['cidade'];
       $empresa = $registros['empresa'];
       $setor = $registros['setor'];
       $remuneracao = $registros['remuneracao'];
       $beneficios = $registros['beneficios'];
       $nivel_estagio = $registros['nivel_estagio'];
       $vinculo = $registros['vinculo'];
       $processo_sel = $registros['processo_seletivo'];
       $contato = $registros['contato'];   

      echo '<button onclick="deleteVaga('.$id.'.','.'.$cidade.')"><i class="far fa-trash-alt" style="font-size:36px;color:#f00;"></i></button>';
       echo "</tr>';

Answer 1

In doubt do not concatenate, interpole (or format) a string:

echo sprintf('<button onclick="deleteVaga(%d, \'%s\')">...</button>', $id, $cidade);

Interpolating could stay:

echo "<button onclick='deleteVaga({$id}, \"{$cidade}\")'>...</button>";

The syntax you used, '.$id.'.','.'.$cidade.', nor makes sense. You concatenate a string with $id, concatenates a dot character, then comes a comma that is left in the code, then another dot character, to then concatenate with $cidade, that would have its value out of quotes in JS, generating syntax error.

If you still have doubts, analyze the generated HTML and see if it matches what you wanted to generate.