PDO ruining my JSON with " - php

Question

I'm storing a JSON array in a mysql TEXT field using PDO. (encoded with json_encode())
Once I get the data, if I do json_decode the result is NULL.
It seems that PDO is replacing every " with ".
I have already use PDO and JSON together multiple times, but this is the first time I got this problem so I don't understand what's happening.
I'm on PHP 5.4.4
Also, the JSON is sent with AJAX for your information
Thanks if you can help.
Example of JSON in the table :
{"type_voie":"BD","indice_repetition":"T","num_voie":"121","nom_voie":"NOM_RUE","infos_voie":"NOM_RUE2","distribution_speciale":"BP789","cp":"34000","ville":"MONTPELLIER","bureau_distributeur":""}
What i really see with var_dump :
{"type_voie":"BD","indice_repetition":"T","num_voie":"121","nom_voie":"NOM_RUE","infos_voie":"NOM_RUE2","distribution_speciale":"BP789","cp":"34000","ville":"MONTPELLIER","bureau_distributeur":""}
This is inserted with a prepared query
Code for retrieve DATA :
$formDataSQL = '
SELECT * FROM '.$this->prefix.'
WHERE formalite_id = '.$this->proc_id.'
';
$formDataReq = self::$db->prepare($formDataSQL);
$formDataReq->execute();
$formData = $formDataReq->fetch(PDO::FETCH_ASSOC);
Then on the JSON field :
$addrData = json_decode(str_replace('"', '"', $champ['value']), true); // WORKING BUT NOT MAINTAINABLE
$addrData = json_decode($champ['value'], true); // NOT WORKING => NULL + JSON ERROR = JSON_ERROR_SYNTAX
Here is a simplified example of my insert code :
foreach($saveData['personne_physique'] as $field => $value){
if(is_array($value)) $value = json_encode($value);
$param = ':'.$field;
$fields .= $field.'='.$param.', ';
$values[$param] = $value;
}
$fields = trim($fields, ', ');
$persPhysSQL = "UPDATE personne_physique SET $fields WHERE personne_id = ".$this->id;
$persPhysReq = self::$db->prepare($persPhysSQL);
$persPhysReq->execute($values);
Here is how I'm connecting :
$host = 'mysql:dbname='.BDD_NAME.';host='.BDD_HOST.';charset=utf8';
$user = BDD_USER;
$pass = BDD_PASS;
$db = new PDO($host, $user, $pass, array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8") );
This is really strange :(

Answer 1

Here is my example script based on your data example:
<?php
try {
$Connection = new PDO('mysql:host=localhost;dbname=testing', USER, PASS);
$Connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}catch(PDOException $e){
echo 'Unable to connect to database' . "\n";
}
$id = $argv[1];
try {
$data = $Connection->prepare('SELECT * FROM `stackoverflow_26399231` WHERE ID = :id');
$data->bindParam(':id', $id, PDO::PARAM_INT);
$data->execute();
while($row = $data->fetch(PDO::FETCH_OBJ)){
print_r($row);
print_r(json_decode($row->data));
}
$Connection = null;
}catch(PDOException $e){
echo 'Error executing query: ' . $e->getMessage() . "\n";
}
?>
The database table looks like this:
*************************** 1. row ***************************
id: 1
data: {"type_voie":"BD","indice_repetition":"T","num_voie":"121","nom_voie":"NOM_RUE","infos_voie":"NOM_RUE2","distribution_speciale":"BP789","cp":"34000","ville":"MONTPELLIER","bureau_distributeur":""}
When you run the script in the CLI, you get this back:
stdClass Object (
[id] => 1
[data] => {"type_voie":"BD","indice_repetition":"T","num_voie":"121","nom_voie":"NOM_RUE","infos_voie":"NOM_RUE2","distribution_speciale":"BP789","cp":"34000","ville":"MONTPELLIER","bureau_distributeur":""}
)
stdClass Object (
[type_voie] => BD
[indice_repetition] => T
[num_voie] => 121
[nom_voie] => NOM_RUE
[infos_voie] => NOM_RUE2
[distribution_speciale] => BP789
[cp] => 34000
[ville] => MONTPELLIER
[bureau_distributeur] =>
)
How does my script differ to yours? I'm not able to reproduce the issue.
UPDATE:
My update script following your example:
try {
$Connection = new PDO('mysql:host=localhost;dbname=testing', USER, PASS);
$Connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}catch(PDOException $e){
echo 'Unable to connect to database' . "\n";
}
$id = $argv[1];
$ary = array(
'foo' => 'bar',
'bar' => 'foo',
'a' => 'b',
'c' => 'd',
'e' => 'f'
);
try {
$fields = 'data=:data';
$values = array('data' => json_encode($ary));
$update = $Connection->prepare("UPDATE `stackoverflow_26399231` SET $fields WHERE ID = $id");
$update->execute($values);
$Connection = null;
}catch(PDOException $e){
echo 'Error executing query: ' . $e->getMessage() . "\n";
}
Using the same script to receive as above but changing from PDO::FETCH_OBJ to PDO::FETCH_ASSOC as that's what you're using, I get this output:
Array
(
[id] => 1
[data] => {"foo":"bar","bar":"foo","a":"b","c":"d","e":"f"}
)
stdClass Object
(
[foo] => bar
[bar] => foo
[a] => b
[c] => d
[e] => f
)
So I can still not reproduce the issue you're having. There must be something different between the two scripts.