AJAX/PHP - Cannot get 'json' info to return properly.

pizzipie · 07-28-2023, 02:59 PM

Hi,
My PHP code will not send 'json' data back to caller.

My System: PHP 7.4.3-4ubuntu2.19 (cli) (built: Jun 27 2023 15:49:59)
Firefox 115.0.2(64bit)
Ubuntu 20.04

The echoed return: ["Crocodile2.JPG","FireHydrant.JPG","FlowerForPolly.JPG","JustFlowers.JPG","LeafySeaHorse1.JPG","Leaf ySeaHorse2.JPG","OurBuickDallas.JPG"].

If dataType is changed to "text" then request.done() is triggered ok.

Thanks in advance for help in this,

R

JAVASCRIPT

Code:

 
    var request=$.ajax({
    url: "exiftools_php/exec_exiftools_v0.1.php",
    data: { ajaxArr, "srcdir": "<?php echo $imageSrcDir; ?>" , "targetdir": "<?php echo $imageTargetDir; ?>"},
    type: "POST",
    dataType : "json"
})

request.done(function (mydata) {  // fails - get nothing blank not even errors or Object messages
    alert("done");
    alert(mydata[0]);
})

request.fail(function (mydata) {  // fails every run
    
    alert("fail");                      // alert box shows - "fail"
    alert(status);                   // doesn't show - means alert box doesn't show
    alert(errorThrown);         // doesn't show   - means alert box doesn't show
})

  request.always(function (mydata) {  // doesn't show - means alert box doesn't show 
      alert("always");
      alert(status);
      alert(errorThrown);
      alert(data);

  })

PHP

Code:

set_include_path( '/home/rick/DBases/Dbmysql/include/'); 
error_reporting(E_ALL);
ini_set("display_errors", 1);  // true
ini_set('html_errors', 'On');

require_once "myPhpFunctions.inc";
require_once "exifPhpFunctions_v0.inc";

myprint($_POST); // my version of print_r()

$source=$_POST['srcdir'];
$target=$_POST['targetdir'];

echo json_encode($_POST['ajaxArr']);

bye(19); // my version of exit()

OUTPUT from PHP

Array // $_POST
(
[ajaxArr] => Array
(
[0] => Crocodile2.JPG
[1] => FireHydrant.JPG
[2] => FlowerForPolly.JPG
[3] => JustFlowers.JPG
[4] => LeafySeaHorse1.JPG
[5] => LeafySeaHorse2.JPG
[6] => OurBuickDallas.JPG
)

[srcdir] => /home/rick/Desktop/imageSource/A52_Test
[targetdir] => /home/rick/Desktop/imageTarget
)

ECHO - echo json_encode($_POST['ajaxArr']);

["Crocodile2.JPG","FireHydrant.JPG","FlowerForPolly.JPG","JustFlowers.JPG","LeafySeaHorse1.JPG","Leaf ySeaHorse2.JPG","OurBuickDallas.JPG"]

This goes back to 'client' and request.done(mydata) fails.

If I make only one change - dataType="text" in the ajax call, this is the result:

<pre>Array
(
[ajaxArr] => Array
(
[0] => Crocodile2.JPG
[1] => FireHydrant.JPG
[2] => FlowerForPolly.JPG
[3] => JustFlowers.JPG
[4] => LeafySeaHorse1.JPG
[5] => LeafySeaHorse2.JPG
[6] => OurBuickDallas.JPG
)

[srcdir] => /home/rick/Desktop/imageSource/A52_Test
[targetdir] => /home/rick/Desktop/imageTarget
)
["Crocodile2.JPG","FireHydrant.JPG","FlowerForPolly.JPG","JustFlowers.JPG","LeafySeaHorse1.JPG","Leaf ySeaHorse2.JPG","OurBuickDallas.JPG"]

Bye from exec_exiftools_v0.1.php Line 19 // my version of exit()

NevemTeve · 07-29-2023, 12:57 AM

https://www.linuxquestions.org/quest...gs-4175464257/

pizzipie · 07-29-2023, 02:57 PM

NevemTeve, Thanks for your reply.

If regards your hint:

Quote:

My PHP code will not send 'json' data back to caller.

My System: PHP 7.4.3-4ubuntu2.19 (cli) (built: Jun 27 2023 15:49:59)
Firefox 115.0.2(64bit)
Ubuntu 20.04

Code:

   var request=$.ajax({
    url: "exiftools_php/exec_exiftools_v0.1.php",
    data: { ajaxArr, "srcdir": "<?php echo $imageSrcDir; ?>" , "targetdir": <?php echo $imageTargetDir; ?>"},
    type: "POST",
    dataType : "json"  //  If dataType is "text" request.done() is OK.
})

I cannot get alert() to show a status of the Ajax return. So I don't know what to try to fix this.

NevemTeve · 07-29-2023, 04:15 PM

Please edit your original post and add the missing [code] and [/code] tags.

pizzipie · 07-30-2023, 05:23 PM

PHP

Code:

echo json_encode($_POST['ajaxArr']);

OUTPUT from PHP

Quote:

["Crocodile2.JPG","FireHydrant.JPG","FlowerForPolly.JPG","JustFlowers.JPG","LeafySeaHorse1.JPG","Leaf ySeaHorse2.JPG","OurBuickDallas.JPG"]

Guttorm · 07-31-2023, 07:38 AM

Hi

The default output type in PHP is text/html. Change it before outputting json:

Code:

header('Content-Type: application/json; charset=utf-8');
echo json_encode(...);