Diff Tool which Outputs 1/0 // Yes/No [closed] - php

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I'am searching for an Tool in !PHP! that will return maybe an Array or just something, with which i can lookup if there are any Changes.
Its beeing used to get Data from MySQL turning it into a JSON File and if the JSON File differs from the MySQL Output, then the file should be new generated.
So i just need to type a Function or something else, if there's been changes made, (Yes/No) do X.
Do you guys know any Tool that would work with my Idea?
Thanks for Helping me out.

Answer 1

Your question is vague but, if I understood right, here is an idea:
<?php
class Tool {
var $db; // you will have to provide a valid db connection
function __construct (& $db) {
$this->db = $db;
}
public function execute ($query, $file){
$arr = $this->fetch($query);
$dbJSON = json_encode($arr);
$fileJSON = file_get_contents($file);
if( md5($dbJSON) != md5($fileJSON) ){
$this->write($dbJSON, $file);
}
}
protected function fetch($sql) {
$arr = array();
$result = $this->db->query($sql);
if($result){
// Cycle through results
while ($row = $result->fetch_object()){
$arr[] = $row;
}
// Free result set
$result->close();
}
return $arr;
}
protected function write ($content, $file) {
$fp = fopen('w+', $file);
fwrite($fp, $content);
fclose($fp);
}
}
?>
and a use case:
<?php
$db = new mysqli('localhost','user','pass','database');
// Check for errors
if(mysqli_connect_errno()){
echo mysqli_connect_error();
}else{
$tool = new Tool($db);
$tool->execute('SELECT * FROM users','/com/user.json');
}
?>