B4J Tutorial [BANano] inline php -> server code

Peter had a great idea for a new feature in BANano:
I liked it! He had already written out the ground rules so we only needed a couple of mails to get on the same page. As a result BANano 1.27 has a PHP connection (we plan support for .asp(x), CGI, python, ... later).

A note beforehand: It is always an Ajax POST command, using JSON to do the communication. This may be extended in the future.

Some new settings one can set in AppStart:
B4X:
BANano.PHP_NAME = "myapi.php"
BANano.PHPHost = "http://localhost"
BANano.PHPAddHeader("Access-Control-Allow-Origin: *")

A very simple example using the new CallInlinePHPWait() method. All we have to pass is the php method name, and a Map with key pairs where: the key is the parameter name and the value the parameter value.
B4X:
public Sub ButtonClicked(event As BANanoEvent)
   ' function name and params are Case Sensitive!
   Dim res As String = BANano.CallInlinePHPWait("SayHello", CreateMap("Name": "BANano"))
   log(res)
End Sub

' a simple php method which says hello!
#if PHP
function SayHello($Name) {
   $ret = Array("answer" => "Hello " .$Name. "!");
   echo json_encode($ret);  
}
#End If

When Building the BANano app, an extra php file will be generated. All one has to do is copy this php file to e.g. a WAMPs /www/ folder et voila: both are talking with each other .

An example of a generated php file:
B4X:
<?php
  header("Access-Control-Allow-Origin: *");
 
  $rest_json = file_get_contents("php://input");
  $_POST = json_decode($rest_json, true);
 
  $request='';
  if(isset($_POST['request'])){
      $request = $_POST['request'];
      $params = $_POST['params'];
  }

  if (!function_exists($request)) die("invalid request: '" . $request . "'");

  function SayHello($Name) {
     $ret = Array("answer" => "Hello " .$Name. "!");
     echo json_encode($ret);  
  }
 
  $values = array_values($params);
  call_user_func_array($request, $values);
?>

I personally still favour using B4J's jServer to handle all my server related things (it is really powerful and has proven to be quite a bit faster than e.g. php), but if someone needs a BANano solution that just can't affort to use a VPS, there is now an alternative.

BANano 1.27 can be downloaded here: https://www.b4x.com/android/forum/threads/banano-progressive-web-app-library.99740

Alain
 
Last edited:

LWGShane

Well-Known Member
Licensed User
Longtime User
Two questions:
1: Will this eventually lead to a B4PHP?
2: Have you considered opening a Patreon account?
 

alwaysbusy

Expert
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Longtime User
Will this eventually lead to a B4PHP
Definitely something I have been thinking about last week. I don't think the transpiling would be a problem, just how to distinguish which B4J code needs to be transpiled to Javascript, and which to PHP.

Have you considered opening a Patreon account?
I don't know that platform. I see it is for artists. Should it also apply to programmers?
 

LWGShane

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Licensed User
Longtime User

OliverA

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Cableguy

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Patreon is way beyhond being "just for artist"! Almost every youtuber, worthy of such a name, has a patreon account, as main "please keep on doing what you are doing cause you do it good!"...

SO… KEEP ON DOING....
 

giannimaione

Well-Known Member
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Longtime User
sorry for post dated 2019;

i test example with a lib fpdf.php here
B4X:
banano.CallInlinePHP("TestPDF", CreateMap("Name": "test"), "ID1")
'
Sub BANano_CallInlinePHPResult(Success As Boolean, UniqueID As String, Result As String)
    Log(Success)
    Log(UniqueID)
    Log(Result)
'maybe I have to manipulate the result ?
End Sub
'
#if PHP
function TestPDF($Name) {
    require('fpdf.php');
    $pdf = new FPDF();
    $pdf->AddPage();
    $pdf->SetFont('Arial','B',16);
    $pdf->Cell(40,10,'Prova pdf!');
    $pdf->Close();
    $pdf->Output('example_006.pdf', 'D');
}
#End If

log Succes is True
log Result is:
B4X:
%PDF-1.3
3 0 obj
<</Type /Page
/Parent 1 0 R
/Resources 2 0 R
/Contents 4 0 R>>
endobj
4 0 obj
<</Filter /FlateDecode /Length 70>>
stream
......
......
endstream
endobj
6 0 obj
<</Type /Font
/BaseFont /Helvetica-Bold
/Subtype /Type1
/Encoding /WinAnsiEncoding
/ToUnicode 5 0 R
>>
endobj
2 0 obj
<<
/ProcSet [/PDF /Text /ImageB /ImageC /ImageI]
/Font <<
/F1 6 0 R
>>
/XObject <<
>>
>>
endobj
7 0 obj
<<
/Producer (FPDF 1.86)
/CreationDate (D:20240627061938+00'00')
>>
endobj
8 0 obj
<<
/Type /Catalog
/Pages 1 0 R
>>
endobj
xref
0 9
0000000000 65535 f
0000000226 00000 n
0000000865 00000 n
0000000009 00000 n
0000000087 00000 n
0000000313 00000 n
0000000747 00000 n
0000000969 00000 n
0000001052 00000 n
trailer
<<
/Size 9
/Root 8 0 R
/Info 7 0 R
>>
startxref
1101
%EOF
but the pdf file is not generated;

testing ONLY php script (test.php), works well
localhost/test.php

maybe I have to manipulate the result ?
 
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