I want to update my database without refreshing the page when selecting an option from my drop down menu. So I will use Ajax. The problem is that without refreshing the page and without seeing the PHP code running, I cannot see if there are any errors in my code in order to fix them. Is there any way to see the data that I pass when selecting an option from my drop down to my PHP file, and see any errors the PHP file reports when processing that data?
I have tried to check the console of my browser but it doesn't display anything.
My drop down:
echo "<select id='vacationId' name='vacationId' style='background:lightblue'>
<option selected='selected' value='' style='background:lightblue'></option>
<option value='" . $vacationIdP . "' style='background:lightblue'>P</option>
<option value='" . $vacationIdO . "' style='background:lightblue'>O</option>
<option value='" . $vacationIdA . "' style='background:lightblue'>A</option>
<option value='" . $vacationIdR . "' style='background:lightblue'>R</option>
</select>";
Ajax code to pass the option Value to a PHP file:
$('#vacationId').change(function(){
var option = $('#vacationId').val();
console.log(option);
$.ajax({
type: 'GET',
url: 'saveVV.php',
data:
{
option:option // Does this pass the value of the option ?
// Can I access this in my PHP file with $vacationId = $_GET['option'];
}
}).done(function(resp){
if(resp == 200) {
console.log('Success!');
}else if(resp == 0){
console.log('Failed..');
}
});
});
What I want is to pass the Value of the selected option to my PHP file and then do some processing to it in PHP. And I want to see that I pass the correct info to my PHP file. And I would like to see the PHP code running with that info and maybe displaying some errors.
You can use this wrapper I wrote
https://github.com/ArtisticPhoenix/MISC/blob/master/AjaxWrapper/AjaxWrapper.php
class AjaxWrapper{
/**
* Development mode
*
* This is the least secure mode, but the one that
* diplays the most information.
*
* @var string
*/
const ENV_DEVELOPMENT = 'development';
/**
*
* @var string
*/
const ENV_PRODUCTION = 'production';
/**
*
* @var string
*/
protected static $environment;
/**
*
* @param string $env
*/
public static function setEnviroment($env){
if(!defined(__CLASS__.'::ENV_'.strtoupper($env))){
throw new Exception('Unknown enviroment please use one of the '.__CLASS__.'::ENV_* constants instead.');
}
static::$environment = $env;
}
/**
*
* @param closure $callback - a callback with your code in it
* @param number $options - json_encode arg 2
* @param number $depth - json_encode arg 3
* @throws Exception
*
* @example
*
*
*/
public static function respond(Closure $callback, $options=0, $depth=32){
$response = ['userdata' => [
'debug' => false,
'error' => false
]];
ob_start();
try{
if(!is_callable($callback)){
//I have better exception in mine, this is just more portable
throw new Exception('Callback is not callable');
}
$callback($response);
}catch(\Exception $e){
//example 'Exception[code:401]'
$response['error'] = get_class($e).'[code:'.$e->getCode().']';
if(static::$environment == ENV_DEVELOPMENT){
//prevents leaking data in production
$response['error'] .= ' '.$e->getMessage();
$response['error'] .= PHP_EOL.$e->getTraceAsString();
}
}
$debug = '';
for($i=0; $i < ob_get_level(); $i++){
//clear any nested output buffers
$debug .= ob_get_clean();
}
if(static::environment == static::ENV_DEVELOPMENT){
//prevents leaking data in production
$response['debug'] = $debug;
}
header('Content-Type: application/json');
echo static::jsonEncode($response, $options, $depth);
}
/**
* common Json wrapper to catch json encode errors
*
* @param array $response
* @param number $options
* @param number $depth
* @return string
*/
public static function jsonEncode(array $response, $options=0, $depth=32){
$json = json_encode($response, $options, $depth);
if(JSON_ERROR_NONE !== json_last_error()){
//debug is not passed in this case, because you cannot be sure that, that was not what caused the error.
//Such as non-valid UTF-8 in the debug string, depth limit, etc...
$json = json_encode(['userdata' => [
'debug' => false,
'error' => json_last_error_msg()
]],$options);
}
return $json;
}
}
For example
AjaxWrapper::setEnviroment(AjaxWrapper::ENV_DEVELOPMENT);
AjaxWrapper::respond(function(&$result){
echo "foo";
//..other code
$response['success'] = true;
});
Then when you do console.log it will have whatever was output within the callback as data.debug etc..
Hope it helps.
It uses a combination of ob_* output buffering and exception trapping try/catch to catch any output and wrap it up in an item data.debug or data.error if the environment is set correctly.
Then when you do ajax stuff ... function(data) { console.log(data); } it will be included.
data.debug = "foo"
And so on.
You need to add the dataType parameter, and the data parameter in the ajax call is a javascript object of key and value. So the key should be in single/double quotes mentioned in the code below:
$.ajax({
type: 'GET',
url: 'saveVV.php',
dataType: 'json',
data: { 'option':option } // In php you can access like $_GET['option']
}).done(function(resp){
if(resp == 200) {
console.log('Success!');
}else if(resp == 0){
console.log('Failed..');
}
});