Ajax does not send data to PHP

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I have the following code in Ajax:

<script>
    $('#enviar').click(function() {   
        let dados
        let filtros = document.getElementsByName('filtro[]');
        let filtrosvalidos = [];
        filtros.forEach(function(elemento, index){
            if(elemento.checked){
                filtrosvalidos.push(elemento.value)
            }
        })
        let pesquisa = document.getElementById('pesquisa').value
        let pesquisa2 = document.getElementById('pesquisa2').options[document.getElementById('pesquisa2').selectedIndex].value
        let horaatual = document.getElementById('horaatual').value
        $.ajax({
            type : "POST",
            url : "pesquisar.php",
            crossDomain: true,      
            contentType: "application/json; charset=utf-8",
            //dataType: 'json',       
            data:{
                    filtro: JSON.stringify(filtrosvalidos),
                    pesquisa: JSON.stringify(pesquisa),
                    pesquisa2: JSON.stringify(pesquisa2),
                    horaatual: JSON.stringify(horaatual),
            },
            success : function(responseData, textStatus, jqXHR) {
                // dados = JSON.parse(responseData)
                // processarDados(dados)
                console.log(responseData);
            }
});

});

And in php, the following code:

<?php

echo 'ok';
echo json_decode($_POST['filtro']);

?>

However, nothing leaves the console when I return php echo to ajax. Does anyone know why?

php javascript jquery ajax json

  • print_r(json_decode($_POST['filtro']));

  • That’s not the problem, because json_decode returns a string, so echo would work the same way. But still, I test print_r and it returns me saying that the index 'filter' is undefined. If I put echo ($POST) it returns me an empty array, so I said on the question that I suspect that ajax is not sending the data to PHP.

  • https://www.php.net/manual/en/function.json-decode.php

1 answer

0


I found the solution. I switched POST to GET, both in ajax code and PHP code and it worked.

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