How the variable passes via $_POST

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I’m creating a code snippet where I assign the data entered into a array in the javascript and moving on to the next program. But the problem is that if I use the $_GET it can not support when reaching a maximum number of characters, then would like to pass via $_POST, but I’m not finding a right way to catch the variável of javascript and store in the hidden to pass through post.

Code:

<html>
<form name="sai_frm_incl" method="POST">
    <body>  
    <table border="0" width="100%">
        <tr>
            <td colspan="3" bgcolor="Silver" align="center">    
            <? 
             echo('<input type="hidden" name="w_patr_seri" value="' .$w_patr_seri.'" />'); 
            ?>
            </td>
        </tr>
            <tr>
                <td>   
                    <font face="arial" align="center" color="blue" size="-1">Teste</font><br>
                    <input type="text" name="nm_cb_tama_moni" id="id_tama_moni" maxlength="12" size="12" style="font-size:11; color:Black;" value="">
    </table>
    </body>
</form>
</html>

Javascript:

function move_patr(Origem)
{
   v_patr = v_patr + document.forms['sai_frm_incl'].nm_cb_tama_moni.value;
}

I mean, I want to store the contents of v_patr in $w_patr_seri!

php javascript html

  • Do you want to submit an ajax form? Have you tried jQuery? $.ajax({type:'POST',...});

  • I don’t understand well, it seems more like a php problem... And the markup should be <?php ... ? > otherwise it might not work.

  • @Kaduamaral, I was using v_patr to pick up the next program via $_GET content, but the problem is that GET only supports a maximum number of characters, so I decided to store the contents of v_patr in a Hidden variable and pass via POST!

  • It’s kind of hard to understand your logic, but come on. You want a value of javascript, be passed to a form, for PHP to receive this data? Where is the element document.forms['sai_frm_incl'].nm_cb_tama_moni.value; that you’re getting the value? I didn’t find it in your code.

  • Error my @Kaduamaral, I ended up copying the wrong excerpt. The excerpt would be this <input type="text" name="nm_cb_tama_moni" id="id_tama_moni" maxlength="12" size="12" style="font-size:11; color:Black;" value="">. And yes I want the value of JS get caught by PHP.

1 answer

2


Sending the data

To send a value per POST, via javascript, the easiest way is by using jQuery.

Using jQuery

$.ajax({
    url: 'pagina-para-receber-os-dados.php',
    type: 'POST', // GET é o padrão
    dataType: 'json', // pode ser xml, json, script, ou html, o jQuery também detecta automáticamente, 
                      // mas é  bom sempre informar
    data: {'vpart': $('#id_tama_moni').val()}, // Também pode usar serialize para enviar todo o formulário
    success: function(data){ // script executado, quando o ajax é enviado com sucesso
        console.log(data);
        alert(data.msg);
    },
    error : function(XMLHttpRequest, textStatus, errorThrown) { // Script executado quando houve erro
       console.log(XMLHttpRequest, textStatus);
       console.log('----------------------------------');
       console.log(XMLHttpRequest.responseText);
       console.log('----------------------------------');
       console.log(errorThrown);
       alert('Houve um erro ao enviar os dados');

    }
});

Pure Javascript

var xmlhttp;

if (window.XMLHttpRequest) { // code for IE7+, Firefox, Chrome, Opera, Safari
    xmlhttp=new XMLHttpRequest();
} else { // code for IE6, IE5
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}

xmlhttp.open("POST","pagina-para-receber-os-dados.php",true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
valor = document.getElementById('id_tama_moni').value;
xmlhttp.send("vpart="+valor);

xmlhttp.onreadystatechange= function() {
    if (xmlhttp.readyState==4 && xmlhttp.status==200) { // script executado, quando o ajax é enviado com sucesso
        alert(xmlhttp.responseText);
    } else { // Script executado quando houve erro
        alert('Houve um erro ao enviar os dados');
    }
}

Receiving the data

PHP (page-to-receive-the-data.php)

<?php
    if (isset($_POST['vpart'])){
        echo json_encode(array('msg' => 'Dados recebidos com sucesso pelo servidor'));
    } else {
        echo json_encode(array('msg' => 'Os dados não foram recebidos pelo servidor'));
    }
    exit;

Changing the value of an element

Using jQuery

v_patr = v_patr + $("#nm_cb_tama_moni").val();
$("#w_patr_seri").val(v_patr);

Using Javascript

v_patr = v_patr + document.forms['sai_frm_incl'].nm_cb_tama_moni.value;
document.getElementById("w_patr_seri").value = v_patr;

HTML

<html>
  <head><title>Titulo da Pagina</title></head>
  <body>  
    <form name="sai_frm_incl" method="POST">
      <table border="0" width="100%">
        <tr>
          <td colspan="3" bgcolor="Silver" align="center">    
            <input type="hidden" name="w_patr_seri" id="w_patr_seri" value="<?=$w_patr_seri?>" />
          </td>
        </tr>
        <tr>
          <td>
            <font face="arial" align="center" color="blue" size="-1">Teste</font><br>
            <input type="text" name="nm_cb_tama_moni" id="id_tama_moni" maxlength="12" size="12" style="font-size:11; color:Black;" value="">
          </td>
        </tr>
      </table>
    </form>
  </body>
</html>

Note: Put an ID in the HIDDEN field you want to assign the value

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