PHP - Usage Of Catch/block

Hello guys.

Is it possible to catch a fatal error and then do something?

What I need to do is to catch the error and run the script a second time, before the first execution ends.

Kind regards and thanks for advance.

How can i catch this exception and run the catch code  , and stop the error message displaying on the webpage . Thanks

<?php
  try{
   
    
    echo $_SESSION['btn'];
    
}
catch(Exception $ex)
{
    
    $_SESSION['btn'] = "Check Available";
    echo $_SESSION['btn'];
}
 ?>"/>

Please help

I am new to the Laravel Framework, doing an internship and at the very end.. I need some assistance please with some try catch error, Its supposed to throw an error if the site name is already in the database.. If someone could help me please and thank you ..   ```   public function create()
         {
                return View::make('edit.create');
         }
         
         public function edit( $clientsite )
        
         {
                return View::make('edit.edit', compact('clientsite'));
         }
         public function saveCreate()
         {
                $input = Input::all();
                
        try
            {
                
                $clientsite = new ClientSite;
                $clientsite->siteName = $input['siteName'];
                $clientsite->description = $input['description'];
                $clientsite->launchDate = $input['launchDate'];
                $clientsite->save();
             
                
                //ClientSite::whereSiteName($clientsite->siteName)->first();
                ClientSite::where('siteName', $clientsite->siteName)->first();
                $clientID = $clientsite['clientID'];//getting clientID for use in join query
                            //queries for retrieving features of each group for the selected client
                $clientFeatures = DB::table('features')->join('clientFeatures', function($join) use($clientID)
{
                $join->on( 'clientFeatures.featureID', '=', 'features.featureID')
                ->where('clientFeatures.clientID', '=', $clientID);
                })->get();
                $groupIDs = array();
                foreach ($clientFeatures as $c) {
                $groupIDs[] = $c->groupID;
                
}

            catch(\Illuminate\Database\QueryException $e)
{
                return View::make('profiles.clientProfiles')->with('clientsite',$clientsite)
                ->with('groupIDs',$groupIDs)
                ->with('clientFeatures',$clientFeatures)
                ->with('status','<strong>'.$siteName.' Site already exist!</strong>');

                ;  
                
         
            } ``` https://github.com/webdevdea/MyDyn ( i have not pushed these changes because I have an error )

I want to use PEAR if it's installed and the regular "mail()" function if not. But to check for PEAR being installed, I can't check for the class PEAR existing because I have to include "Mail.php" first.

The problem is that even though this statement works perfectly:

Code: [Select]
     include_once "Mail.php";
This will ALWAYS be false:

Code: [Select]
    if ( file_exists( "Mail.php" ) ) ...
So how do I check for PEAR? If I just include the file, it throws a warning error that I can't seem to catch in a try..catch.

Hi,

My hosting disabled my account because my site used too many system resources (CPU).
There is no way for me to know how much CPU my site is using since i am not a psychic or god so no clue how they expect me to monitor this or fix this (the site has been running just fine for 2 years with the same code).

Is there any code that can tell me how much CPU my site is using on the server?

Thanks in advance,

Jay

Hi guys,

Yet another rookie question, trying to implement this:

I have a function:

<?php //MyHelper.php

 function getnext( $name )
    {

        $conn = DB::table('counter')->where('name', $name )->first();

        $result =  $conn->findAndModify(
            ['name' => $name],
            ['_id' => ['seq' => 1]],
            ['seq' => true],
            ['new' => true, 'upsert' => true]
        );
       return $result['seq'];

    }
?>

And I am calling it so:

                $db_array = getnext(array('name' => 'role_id'));
                print_r( $db_array);

Results in call to a member function on NULL, not sure where I'm going wrong! It is making a connection and the counter table has a 'role_id' in it. Can anyone tell me where I'm going wrong?

For example, take a look at this: https://code.google....p/phpwebsocket/   When I run the server, it works fine and I am using the server for my Inventory system on my game. When users drag and drop items in their inventory to change position, it sends the data to the html 5 websocket server, and updates the positions accordingly/etc. And I will use it for a bunch of other stuff later.   My question is: What kind of VPS would I be looking for in terms of ram/cpu power to keep a websocket server like this up 24/7? Is it more memory intensive than socket/io/nodejs? Or what? How can I test these things? Looking at cmd.exe or php.exe in my task manager when having it run on my local windows machine isn't really a good way to test performance, or to estimate how much ram or VPS/CPU power of a server I'll need before launch.  I can get a idea, but I don't think it's going to be close to reality. That's why I'm asking you guys here if you would know.  Thanks
Edited by Monkuar, 17 January 2015 - 12:24 AM.

Hello,

So I am trying to reduce my memory footprint to the lowest possible value without sacrificing functionality.

I noticed that if I write a comment that is 2kb long, it costs me 2kb more memory to run the script.

How can I get PHP to free the memory taken up by comments? It seems like it would be a real pain in the butt to have to run php -w on all my source files each time I update my server.

Any ideas?

Thanks.

David

I have searched a lot but no information about this aspect. I wonder how much heavy is the process of getting parts of a webpage by preg_match?

But my question is that which of these options are in favor of lighter CPU process:

1. getting each item between specified tags by a preg_match
or
2. First getting the content between <body>, then processing by php tools such as preg_match (again), explode, etc.

Thanks for considering this unusual question 

This topic has been moved to Application Design.

http://www.phpfreaks.com/forums/index.php?topic=320813.0

I was wondering how to resize DIVs based upon their usage. I have some vague ideas of how to do it, but not sure. Basically, the more a user clicks a DIV, the large it becomes relative to all other DIVs (no DIVs ever disappear!)

Any ideas?

I have some simple test code:

Code: [Select]
echo memory_get_usage(true);
echo("\n" . '<br />' . "\n");
echo memory_get_usage(false);
echo("\n" . '<br />' . "\n");
echo memory_get_peak_usage();

that prints out the three types of memory usage in bytes for my basic admin page.

All three values are around 2.25 MB in bytes.

What's best practice for PHP memory usage? Is 2.25MB far too much for a single user's visit?

Do these PHP memory values include images in the page?

I've been doing some benchmarking for memory usage for a very resource-sensitive project I'm doing (that I probably shouldn't be using PHP for, but oh well). I came across something peculiar, and I'm trying to figure out why I get results as I do.

Here is my test file:

<?php
$string_parts = 4;
$max = 10000;
$arr = array();
$i = 0;
$start = memory_get_usage();
for(;$i<$max;$i++){
$arr[] = array_pad(array(), 4, "A");
}
$end = memory_get_usage();
printf("%d iterations, %d bytes in array\n", $max, $end-$start);

$arr2 = array();
$i = 0;
$start2 = memory_get_usage();
for(;$i<$max;$i++){
$arr2[] = array("A", "A", "A", "A");
}
$end2 = memory_get_usage();
printf("%d iterations, %d bytes in array (%.2f%%)\n", $max, $end2-$start2, ($end2-$start2)/($end-$start)*100);
?>


Output on my system:
Code: [Select]
10000 iterations, 4145696 bytes in array
10000 iterations, 5585744 bytes in array (134.74%)
A 35% memory gain for two of the same exact arrays seems really weird. Any information as to why, or perhaps any useful functions or resources would be appreciated.

This topic has been moved to Other Libraries and Frameworks.

http://www.phpfreaks.com/forums/index.php?topic=319964.0

This topic has been moved to Application Design.

http://www.phpfreaks.com/forums/index.php?topic=346818.0