data conversion problems with php

Question

I have the following function that transforms timestamp into English readable date

function dataEmPortugues ($timestamp, $hours = TRUE, $timeZone = "America/Sao_Paulo") {
  $timestamp=strtotime($timestamp);
    $dia_num = date("w", $timestamp);// Dia da semana.

    if($dia_num == 0){
      $dia_nome = "Domingo";
    }elseif($dia_num == 1){
      $dia_nome = "Segunda-feira";
    }elseif($dia_num == 2){
      $dia_nome = "Terça-feira";
    }elseif($dia_num == 3){
      $dia_nome = "Quarta-feira";
    }elseif($dia_num == 4){
      $dia_nome = "Quinta-feira";
    }elseif($dia_num == 5){
      $dia_nome = "Sexta-feira";
    }else{
      $dia_nome = "Sábado";
    }

    $dia_mes = date("d", $timestamp);// Dia do mês

    $mes_num = date("m", $timestamp);// Nome do mês

    if($mes_num == 01){
      $mes_nome = "Janeiro";
    }elseif($mes_num == 02){
      $mes_nome = "Fevereiro";
    }elseif($mes_num == 03){
      $mes_nome = "Março";
    }elseif($mes_num == 04){
      $mes_nome = "Abril";
    }elseif($mes_num == 05){
      $mes_nome = "Maio";
    }elseif($mes_num == 06){
      $mes_nome = "Junho";
    }elseif($mes_num == 07){
      $mes_nome = "Julho";
    }elseif($mes_num == 08){
      $mes_nome = "Agosto";
    }elseif($mes_num == 09){
      $mes_nome = "Setembro";
    }elseif($mes_num == 10){
      $mes_nome = "Outubro";
    }elseif($mes_num == 11){
      $mes_nome = "Novembro";
    }else{
      $mes_nome = "Dezembro";
    }
    $ano = date("Y", $timestamp);// Ano

    date_default_timezone_set($timeZone); // Set time-zone
    $hora = date ("H:i", $timestamp);

    if ($hours) {
      return $dia_nome.", ".$dia_mes." de ".$mes_nome." de ".$ano." às ".$hora;
    }
    else {
      return $dia_nome.", ".$dia_mes." de ".$mes_nome." de ".$ano;
    }
  }

I have a Stamp team

2016-11-30 15:12:09

and when I convert using this function it returns

Quarta-feira, 30 de Novembro de 2016 às 13:12

is returning with 2 hours difference. how do I fix it ?

Answer 1

Rethinking the code:

In case you use the Runtime version, date_default_timezone_set, call it BEFORE using the date functions. At the beginning of the code that calls the function, and not inside it.

In your code apparently you are using in the middle of the function, and to have consistency, would have to use only once after opening PHP.

Configuration alternatives:

Who defines the PHP time zone is this function:

bool date_default_timezone_set ( string $timezone_identifier )

Or this configuration directive:

date.timezone =

Handbook:

http://php.net/manual/en/function.date-default-timezone-set.php http://php.net/manual/en/datetime.configuration.php#ini.date.Timezone

Note: if in any situation you need the time without the zone, you can choose the function gmdate(), which uses the same parameters, but takes UTC as the basis.

Choosing the string correct:

Below, the manual links to make it easy for anyone to customize calls to a specific region.

For Brazil, you can use:

date_default_timezone_set('America/Sao_Paulo');

And for Portugal:

date_default_timezone_set('Europe/Lisbon');

See the full list here:

http://php.net/manual/en/timezones.php

Answer 2

I took the liberty of "tweaking" the code pattern and removing redundancies. But I kept the structure so it wasn’t too invasive.

An interesting point is that from the PHP7 the stretch with } elseif ($mes_num == 08) { could cause the error type "parse" Invalid numeric literal.

Before, literal octals containing invalid numbers were silently truncated (0128 would become 012). Now, an octal invalid literal will cause a parse error. Consult: http://php.net/manual/en/migration70.incompatible.php#migration70.incompatible.integers

So I removed all the zeroes on the left, but I would have removed them anyway.

This is just an observation because it was not that that caused the error reported in the question and deviates a little from the main focus.

As to why the original code was two hours apart, I didn’t find out. Just reread the script for an easier way by extracting the values with the function substr() because I thought it was unnecessary to make so many calls to function date(), timezone, etc..

The important thing is that the change causes the function to return what it wants.

function dataEmPortugues($date, $hours = true)
{

    $dia_num = date('w', strtotime($date));// Dia da semana.

    if($dia_num == 0) {
        $dia_nome = 'Domingo';
    } elseif ($dia_num == 1) {
        $dia_nome = 'Segunda-feira';
    } elseif ($dia_num == 2) {
        $dia_nome = 'Terça-feira';
    } elseif ($dia_num == 3) {
        $dia_nome = 'Quarta-feira';
    } elseif ($dia_num == 4) {
        $dia_nome = 'Quinta-feira';
    } elseif ($dia_num == 5) {
        $dia_nome = 'Sexta-feira';
    } else {
        $dia_nome = 'Sábado';
    }

    // Faz um cast integer para remover zeros a esquerda
    $mes_num = (int)substr($date, 5, 2);// Nome do mês

    if($mes_num == 1) {
        $mes_nome = 'Janeiro';
    } elseif ($mes_num == 2) {
        $mes_nome = 'Fevereiro';
    } elseif ($mes_num == 3) {
        $mes_nome = 'Março';
    } elseif ($mes_num == 4) {
        $mes_nome = 'Abril';
    } elseif ($mes_num == 5) {
        $mes_nome = 'Maio';
    } elseif ($mes_num == 6) {
        $mes_nome = 'Junho';
    } elseif ($mes_num == 7) {
        $mes_nome = 'Julho';
    } elseif ($mes_num == 8) {
        $mes_nome = 'Agosto';
    } elseif ($mes_num == 9) {
        $mes_nome = 'Setembro';
    } elseif ($mes_num == 10) {
        $mes_nome = 'Outubro';
    } elseif ($mes_num == 11) {
        $mes_nome = 'Novembro';
    } else {
        $mes_nome = 'Dezembro';
    }

    return $dia_nome.', '.(int)substr($date, 8, 2).' de '.$mes_nome.' de '.substr($date, 0, 4).($hours? ' às '.substr($date, 11, 5): '');
}

echo dataEmPortugues('2016-11-30 15:12:09');

Running time: 0.0000169277191162109s (0.0169 milliseconds)