$.ajax. Also you should be familiar with PHP's functions utf8_encode and utf8_decode |
| Raw outuput of JSON string and Base64 encoded JSON string |
Here is the source code for index.html:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script>
function go() {
$.ajax({
type : "GET",
url : "job.php?p=" + $('#unittype').val(),
success : function(data) {
$('#m').html(data);
}
})
}
</script>
</head>
<body>
<select id="unittype" name="unittype" onchange="go();">
<option value="Miner"> Miner </option>
<option value="Puffer"> Puffer </option>
<option value="Snipey" selected> Snipey </option>
<option value="Max"> Max </option>
<option value="Firebot"> Firebot </option>
</select>
<div id="m">
</div>
</body>
</html>
and for PHP backend file:job.php
<?php
session_start();
if (isset($_SESSION['visits'])) {
$_SESSION['visits']++;
} else {
$_SESSION['visits']=0;
}
echo "Im form AJAX call at ".date('H:i:s');?>
<?php
$_SESSION['city'] = 'Paris';
$_SESSION['country'] = 'France';
$jsonFormatedString = json_encode($_SESSION);
$jb64 = base64_encode($jsonFormatedString);
$jsonFormatedString = str_replace(array('"',"'"),array('”',"’"), $jsonFormatedString);
echo <<<EOT
<script>console.debug("$jsonFormatedString");</script>
EOT;
echo <<<EOT
<script>console.debug("$jb64");</script>
EOT;
?>
Working with apache error and access logs in real time
Must be logged in as root# cd /etc/httpd/logs # ls -all total 1128 drwx------. 2 root root 4096 Feb 14 02:35 . drwxr-xr-x. 11 root root 4096 Apr 1 21:09 .. -rw-r--r--. 1 root root 867866 Apr 2 01:10 access_log -rw-r--r--. 1 root root 269285 Apr 2 01:10 error_log
Shows all rows
shows only rows that have 'select' word and highlights rows until grep reaches ';'
shows rows not containing 101
# tail -f error_log # tail -f error_log | grep -i --color "select.*;" # tail -f -v error_log | grep -v '101'
shows rows not containing css, js and images
# tail -f access_log | grep -v 'css\|js\|images'
Sending errors and messages to apache log
// Full file path in error log
error_log( "Error in file ".__FILE__." something went wrong");
// Only file name in error log
error_log( "Error in file {$_SERVER['PHP_SELF']}" );
Another way to show debug output in console very useful in MVC frameworks
<?php
$_SESSION['city'] = 'Paris';
$_SESSION['country'] = 'France';
$d = addslashes(dirname(__FILE__)).$_SERVER['SCRIPT_NAME'];
echo "<script>console.log(' message in $d ".json_encode($_SESSION)." ');</script>";
?>
Third way that handles strings, JSON and MySQL query strings
This way you can get a console output with Object notation
<?php
$_SESSION['city'] = 'Paris';
$_SESSION['country'] = 'France';
echo "<script>console.info('".$_SESSION['city']."');</script>\n";
echo "<script>console.info(".json_encode($_SESSION).");</script>\n";
$jsonString = '{"balance":1000.21,"num":100,"nickname":null,"is_vip":true,"name":"foo"}';
echo "<script>console.info($jsonString);</script>\n";
$query = "SELECT * FROM `table` WHERE `name` = 'Mark'";
echo "<script>console.info(\" $query \");</script>\n";
?>
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