What php code do I use to know if the data is being received from a given form?

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I have two search forms. The first with the name "buscaid" the second "buscaimv" needs a php code that checks whether data is being received from either of the two only, otherwise it will be redirected to a specific page.

php form script
  • 1

    look at the php.net manual: there talks a little more about the use of variables and about the method: $_POST

2 answers

3

One simple way to do this, only with php/html is to define a Hidden that identifies which form is triggered, in this example I imagine that both use the same action. It is also possible to do this with javascript.

Example - simple.

<form method="post" action="">
    <input type="hidden" name="tipo" value="pf">
    CPF: <input type="text" name="cpf" value="111.111.111.11" />
    <input type="submit" />
</form>

<form method="post" action="">
<input type="hidden" name="tipo" value="pj">
    CNPJ: <input type="text" name="cnpj" value="222.222.222.222/22" />
    <input type="submit" />
</form>

<?php

if($_POST['tipo'] == 'pf'){
    echo $_POST['tipo'] .'-'.  $_POST['cpf'];
}else if($_POST['tipo'] == 'pj'){
    echo $_POST['tipo'] .'-'. $_POST['cnpj'];
}

3

In addition to the proper solution posted by @rray, you can use the Submit fields to differentiate the Forms:

<form method="post" action="">
    CPF: <input type="text" name="cpf" value="111.111.111.11" />
    <input name="enviar_pf" type="submit" value="Enviar"/>
</form>

<form method="post" action="">
    CNPJ: <input type="text" name="cnpj" value="222.222.222.222/22" />
    <input name="enviar_pj" type="submit" value="Enviar"/>
</form>

<?php
  if( isset( $_POST['enviar_pf'] ) ){
     echo 'CPF: '.  $_POST['cpf'];
  } elseif( isset( $_POST['enviar_pj'] ) ) {
     echo 'CNPJ: '. $_POST['cnpj'];
  }

Note that in the case you posted, even this would not need to, because there are right name fields, you can test directly by them: isset( $_POST['cpf'] )

An alternative that works perfectly despite not being exactly within the specs, is to add a GET parameter to the POST:

<form method="post" action="?tipo=cpf">
    CPF: <input type="text" name="cpf" value="111.111.111.11" />
    <input name="enviar_pf" type="submit" value="Enviar"/>
</form>

<form method="post" action="?tipo=cnpj">
    CNPJ: <input type="text" name="cnpj" value="222.222.222.222/22" />
    <input name="enviar_pj" type="submit" value="Enviar"/>
</form>

<?php
  if( $_GET['tipo'] == 'cpf' ){
     echo 'CPF: '.  $_POST['cpf'];
  } elseif( $_GET['tipo'] == 'cnpj' ) {
     echo 'CNPJ: '. $_POST['cnpj'];
  }

In this case, note the action passing the "type" by query string ?tipo=

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