Realtime with AJAX/MySQL multiple variables? - php

Question

I have an dymamic PHP file that load Data from MySQL database about some relay card, every user have a different amount of relay card. All card have 8 relays (State 1/0), 8 inputs (State 1/0), and 2 analogue input (State from 0 to 1024) this is for every card, some user will have 1 and some other can have 8 and i would like to update this data as fast as possible. I have done a PHP script that trigger all relays information for a specific user, in this case this is the user 2.
I think the best way to do what i want as what i have read is to call it from jQuery, but i don't understand how-o update many variable.
Here is the code i have to get the latest state from MySQL.
Ok here is an update of the code, i have separated completely the data fetching and the GUI creation, so what i want to do, is show in realtime what the get_states_gui.php file fetch from mysql to the gui.php file. Can someone point me in the good direction since i am completely lost right now! THanx a lot here are those 2 files:
The gui.php:
<?php
require_once('config.php');
$time = microtime();
$time = explode(' ', $time);
$time = $time[1] + $time[0];
$start = $time;
// We create connection to the MySQL database.
$con = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
if(!$con) {
die('Failed to connect to server: ' . mysql_error());
}
//Select database
$db = mysql_select_db(DB_DATABASE);
if(!$db) {
die("Unable to select database\n");
}
$req="SELECT * FROM cartes WHERE utilisateur=$user";
$result = mysql_query($req);
if(!$result) {
die('Query failed: ' . mysql_error());
}
$nb_iplab = mysql_num_rows($result);
$b = "1";
while ($ligne = mysql_fetch_assoc($result))
{
extract($ligne);
${'nom'.$b} = $nom;
${'mac'.$b} = $mac;
${'ip'.$b} = $ip;
for ($i=1; $i <= "8"; $i++ )
{
//We set Relays names for each IPLAB and get their states in the MySQL database.
${'nomR'.$i.$b} = ${'nomR'.$i};
$req = "SELECT * FROM states_log WHERE dev='R$i' AND mac='${'mac'.$b}' ORDER BY date_heure DESC LIMIT 1";
$result2 = mysql_query($req);
if(!$result2)
{
die('Query failed: ' . mysql_error());
}
$ligne = mysql_fetch_assoc($result2);
extract($ligne);
${'stateR'.$i.$b} = $state;
if ( ${'stateR'.$i.$b} == "1" )
{
${'img_linkR'.$i.$b} = "<a href=set_states.php?ip=${'ip'.$b}&cmd=CR$i target=empty> <img src=img/toggle_1.png height=28></a>";
}
else if ( ${'stateR'.$i.$b} == "0" )
{
${'img_linkR'.$i.$b} = "<a href=set_states.php?ip=${'ip'.$b}&cmd=SR$i target=empty> <img src=img/toggle_0.png height=28></a>";
}
else
{
${'img_linkR'.$i.$b} = "<a href=set_states.php?ip=${'ip'.$b}&cmd=CR$i target=empty> <img src=img/LED_yellow.png height=28></a>";
}
//We set Inputs names for each IPLAB and get their states in the MySQL database.
${'nomI'.$i.$b} = ${'nomI'.$i};
${'multI'.$i.$b} = ${'multI'.$i};
${'img_onI'.$i.$b} = ${'img_onI'.$i};
${'img_offI'.$i.$b} = ${'img_offI'.$i};
${'img_naI'.$i.$b} = ${'img_naI'.$i};
$req = "SELECT * FROM states_log WHERE dev='I$i' AND mac='${'mac'.$b}' ORDER BY date_heure DESC LIMIT 1";
$result2 = mysql_query($req);
if(!$result2)
{
die('Query failed: ' . mysql_error());
}
$ligne = mysql_fetch_assoc($result2);
extract($ligne);
${'stateI'.$i.$b} = $state;
if ( ${'stateI'.$i.$b} == "1" )
{
${'img_linkI'.$i.$b} = "<img src=img/${'img_onI'.$i.$b} height=28>";
}
else if ( ${'stateI'.$i.$b} == "0" )
{
${'img_linkI'.$i.$b} = "<img src=img/${'img_offI'.$i.$b} height=28>";
}
else
{
${'img_linkI'.$i.$b} = "<img src=img/${'img_naI'.$i.$b} height=28>";
}
// We check for how many times, the Inputs has changed state to 1, and we set them as a variable for counter.
$req = "SELECT count(*) FROM states_log WHERE dev='I$i' AND state='1' AND mac='${'mac'.$b}'";
$result2 = mysql_query($req);
if(!$result2)
{
die('Query failed: ' . mysql_error());
}
list (${'countI'.$i.$b}) = mysql_fetch_row ($result2);
if (isset(${'multI'.$i.$b}))
{
${'countI'.$i.$b} = ${'countI'.$i.$b} * ${'multI'.$i.$b};
}
}
//We set Analog names fir each IPLAB and get their states in the MySQL database.
for ($i=1; $i <= "3"; $i++ )
{
${'nomA'.$i.$b} = ${'nomA'.$i};
${'unitA'.$i.$b} = ${'unitA'.$i};
$req = "SELECT * FROM states_log WHERE dev='A$i' AND mac='${'mac'.$b}' ORDER BY date_heure DESC LIMIT 1";
$result2 = mysql_query($req);
if(!$result2)
{
die('Query failed: ' . mysql_error());
}
$ligne = mysql_fetch_assoc($result2);
extract($ligne);
${'stateA'.$i.$b} = $state;
}
if ( debug == "1" )
{
echo "${'nom'.$b}<br>";
echo "MAC = ${'mac'.$b}<br>";
for ( $i = 1; $i <= 8; $i++ )
{
echo "${'nomR'.$i.$b} = ${'stateR'.$i.$b}<br>";
echo "${'nomI'.$i.$b} = ${'stateI'.$i.$b}<br>";
}
for ( $i = 1; $i <= 3; $i++ )
{
echo "${'nomA'.$i.$b} = ${'stateA'.$i.$b}<br>";
}
echo "---------------------------------------<br>";
}
$b++;
}
$time = microtime();
$time = explode(' ', $time);
$time = $time[1] + $time[0];
$finish = $time;
$total_time = round(($finish - $start), 4);
if ( debug == "1" )
{
echo 'Page generated in '.$total_time.' seconds.'."\n";
}
mysql_close($con);
?>
And now the get_states_gui.php:
<?php
require_once('config.php');
$time = microtime();
$time = explode(' ', $time);
$time = $time[1] + $time[0];
$start = $time;
// We create connection to the MySQL database.
$con = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
if(!$con) {
die('Failed to connect to server: ' . mysql_error());
}
//Select database
$db = mysql_select_db(DB_DATABASE);
if(!$db) {
die("Unable to select database\n");
}
$req="SELECT * FROM cartes WHERE utilisateur=$user";
$result = mysql_query($req);
if(!$result) {
die('Query failed: ' . mysql_error());
}
$nb_iplab = mysql_num_rows($result);
$b = "1";
while ($ligne = mysql_fetch_assoc($result))
{
extract($ligne);
${'nom'.$b} = $nom;
${'mac'.$b} = $mac;
${'ip'.$b} = $ip;
for ($i=1; $i <= "8"; $i++ )
{
//We set Relays names for each IPLAB and get their states in the MySQL database.
${'nomR'.$i.$b} = ${'nomR'.$i};
$req = "SELECT * FROM states_log WHERE dev='R$i' AND mac='${'mac'.$b}' ORDER BY date_heure DESC LIMIT 1";
$result2 = mysql_query($req);
if(!$result2)
{
die('Query failed: ' . mysql_error());
}
$ligne = mysql_fetch_assoc($result2);
extract($ligne);
${'stateR'.$i.$b} = $state;
if ( ${'stateR'.$i.$b} == "1" )
{
${'img_linkR'.$i.$b} = "<a href=set_states.php?ip=${'ip'.$b}&cmd=CR$i target=empty> <img src=img/toggle_1.png height=28></a>";
}
else if ( ${'stateR'.$i.$b} == "0" )
{
${'img_linkR'.$i.$b} = "<a href=set_states.php?ip=${'ip'.$b}&cmd=SR$i target=empty> <img src=img/toggle_0.png height=28></a>";
}
else
{
${'img_linkR'.$i.$b} = "<a href=set_states.php?ip=${'ip'.$b}&cmd=CR$i target=empty> <img src=img/LED_yellow.png height=28></a>";
}
//We set Inputs names for each IPLAB and get their states in the MySQL database.
${'nomI'.$i.$b} = ${'nomI'.$i};
${'multI'.$i.$b} = ${'multI'.$i};
${'img_onI'.$i.$b} = ${'img_onI'.$i};
${'img_offI'.$i.$b} = ${'img_offI'.$i};
${'img_naI'.$i.$b} = ${'img_naI'.$i};
$req = "SELECT * FROM states_log WHERE dev='I$i' AND mac='${'mac'.$b}' ORDER BY date_heure DESC LIMIT 1";
$result2 = mysql_query($req);
if(!$result2)
{
die('Query failed: ' . mysql_error());
}
$ligne = mysql_fetch_assoc($result2);
extract($ligne);
${'stateI'.$i.$b} = $state;
if ( ${'stateI'.$i.$b} == "1" )
{
${'img_linkI'.$i.$b} = "<img src=img/${'img_onI'.$i.$b} height=28>";
}
else if ( ${'stateI'.$i.$b} == "0" )
{
${'img_linkI'.$i.$b} = "<img src=img/${'img_offI'.$i.$b} height=28>";
}
else
{
${'img_linkI'.$i.$b} = "<img src=img/${'img_naI'.$i.$b} height=28>";
}
// We check for how many times, the Inputs has changed state to 1, and we set them as a variable for counter.
$req = "SELECT count(*) FROM states_log WHERE dev='I$i' AND state='1' AND mac='${'mac'.$b}'";
$result2 = mysql_query($req);
if(!$result2)
{
die('Query failed: ' . mysql_error());
}
list (${'countI'.$i.$b}) = mysql_fetch_row ($result2);
if (isset(${'multI'.$i.$b}))
{
${'countI'.$i.$b} = ${'countI'.$i.$b} * ${'multI'.$i.$b};
}
}
//We set Analog names fir each IPLAB and get their states in the MySQL database.
for ($i=1; $i <= "3"; $i++ )
{
${'nomA'.$i.$b} = ${'nomA'.$i};
${'unitA'.$i.$b} = ${'unitA'.$i};
$req = "SELECT * FROM states_log WHERE dev='A$i' AND mac='${'mac'.$b}' ORDER BY date_heure DESC LIMIT 1";
$result2 = mysql_query($req);
if(!$result2)
{
die('Query failed: ' . mysql_error());
}
$ligne = mysql_fetch_assoc($result2);
extract($ligne);
${'stateA'.$i.$b} = $state;
}
if ( debug == "1" )
{
echo "${'nom'.$b}<br>";
echo "MAC = ${'mac'.$b}<br>";
for ( $i = 1; $i <= 8; $i++ )
{
echo "${'nomR'.$i.$b} = ${'stateR'.$i.$b}<br>";
echo "${'nomI'.$i.$b} = ${'stateI'.$i.$b}<br>";
}
for ( $i = 1; $i <= 3; $i++ )
{
echo "${'nomA'.$i.$b} = ${'stateA'.$i.$b}<br>";
}
echo "---------------------------------------<br>";
}
$b++;
}
$time = microtime();
$time = explode(' ', $time);
$time = $time[1] + $time[0];
$finish = $time;
$total_time = round(($finish - $start), 4);
if ( debug == "1" )
{
echo 'Page generated in '.$total_time.' seconds.'."\n";
}
mysql_close($con);
?>
I can give access to the source, MySQL etc if someone can help, i am learning right now, And i really enjoy how it goes for now, but the AJAX Jquery thing, i completely miss it!!
Thanx a lot!

Answer 1

You could wright more of an abstract question ... no need for php code ...
If i understood you right , you need to send ajax reqests on a specific time interval to get your updated data ( js function setInterval() )
Here is a link about setInterval : http://www.elated.com/articles/javascript-timers-with-settimeout-and-setinterval/
Here is link about ajax : http://www.w3schools.com/ajax/
If this answer has nothing to do with your question , please review it and state what you want to do with your data? Show it on each update? or what kind of update?

Answer 2

You could use javascript to trriger ajax script after 1 sec delay use setTimeout() in javascript for delay And in your php page retrieve the data and echo it.