- 1 How do I make a thread-safe method?
- 2 How to use thread in PHP?
- 3 How to check SSL in PHP?
How to enable PHP module command?
Enabling PHP Modules – Use phpenmod command followed by module name to enable specific PHP module on your system. In the below example, the first command is an example and the second command will enable mbstring module for all installed PHP versions and all SAPI.
Syntax phpenmod MODULE_NAME ### Enable mbstring php module phpenmod mbstring You can also define the PHP version using -v switch to enable specific modules. Using this you will enable the module for all SAPI. ### Syntax phpenmod -v ### Enable module for specific php version phpenmod -v 8.2 mbstring phpenmod -v 7.4 mbstring Use -s switch to define the SAPI to enable specific modules for specific SAPI for all PHP versions.
### Syntax phpenmod -s ### Enable module for specific SAPI phpenmod -s cli mbstring phpenmod -s fpm mbstring phpenmod -s apache2 mbstring You can also define both the PHP version and SAPI for a more specific update.
How to enable https wrapper in PHP?
To solve this error, you need to install the OpenSSL package for PHP on your webserver. On a FreeBSD server, you may need to install the following package: php53_openssl and restart your webserver. On a Windows server, open your php.ini config file and simply uncomment the following line: ;extension=php_openssl and restart the webserver. The error should be resolved.
How do I make a thread-safe method?
Thread-safe collections in Java – Make sure that your method is not changing values. You can simply make your class immutable, but then we want to be able to change values. When you have multiple threads working with the same method, the methods are going in to perform operations.
- Our operation which is: public void increment() The above looks like an atomic operation, but it is not, a lot of things are happening here.
- It is fetching the current value which is 100 for a count then it is adding the value by 1 that is 100 + 1 and assign this 101 value to count, so it is not a one-step process.
It is a three-step process and it’s not an atomic process. This that is where the problem starts because if two threads are reaching the same point, both will ask for thevalue of the count. The count will respond with my value is 100. Thread 1 will assign 101, thread 2 will assign 101 and that is where we are missing our data.
- We don’t want the two threads to work with the same count at the same time.
- So we want thread safety here.
- This means this method will be executed only by one thread.
- There are multiple ways of doing this: 1.
- By using the synchronized keyword in the method: The synchronized keyword can be used to make any shared resource thread-safe, not just collections.
By declaring a method as synchronized, the acquires a lock on the object that the method belongs to, which ensures that only one thread can execute the method at a time. This helps to avoid race conditions and other synchronization-related issues, making the shared resource thread-safe.
class CounterIncrement } // the main method public class Example1 } }); Thread two = new Thread(new Runnable() } }); one.start(); two.start(); one.join(); two.join(); System.out.println(c.count); } } the code above shows us that only one thread can be called at a time. this means if Thread one = new Thread(new Runnable() } }); is called Thread two = new Thread(new Runnable() } }); has to wait.2.
By using Atomic integer: We may say we don’t want to use synchronize we can use atomic integer instead of int. so we create an object of AtomicInteger count like this: import java.util.concurrent.atomic.AtomicInteger; class CounterIncrement } // the main methods that public class Example1 } }); Thread two = new Thread(new Runnable() } }); one.start(); two.start(); one.join(); two.join(); System.out.println(c.count); } } AtomicInteger count = new AtomicInteger(); we will change count++ to count.incrementAndGet() and when you print this you will get the same result.
How to use thread in PHP?
The Thread class ¶ When the start method of a Thread is invoked, the run method code will be executed in separate Thread, in parallel. After the run method is executed the Thread will exit immediately, it will be joined with the creating Thread at the appropriate time.
What is the difference between PHP FPM and PHP FastCGI?
Overview – Warning: We strongly recommend that you only activate Apache PHP-FPM if your server has at least 2 GB of RAM available, or at least 30 MB of RAM per domain. If you enable PHP-FPM on a server with less than the required RAM, your server may experience severe performance issues.
PHP FastCGI Process Manager (PHP-FPM) is an alternative FastCGI daemon for PHP that allows a website to handle high loads. PHP-FPM maintains pools (workers that can respond to PHP requests) to accomplish this. PHP-FPM is faster than traditional CGI-based methods, such as SUPHP, for multi-user PHP environments.
It does not overload a system’s memory with PHP from Apache processes.
LiteSpeed Web Server uses the lsphp binary. LiteSpeed Web Server does not use the system’s PHP-FPM implementation in WHM’s MultiPHP Manager interface (WHM » Home » Software » MultiPHP Manager), To monitor applications that use PHP-FPM, select the Monitor checkbox for the PHP-FPM service for cPanel Daemons service in WHM’s Service Manager interface (WHM » Home » Service Configuration » Service Manager),
What is the difference between PHP INI and PHP FPM INI?
php.ini: which one? Generally speaking, the cli/php.ini file is used when the PHP binary is called from the command-line. You can check that running php -ini from the command-line. fpm/php.ini will be used when PHP is run as FPM – which is the case with an nginx installation.
And you can check that calling phpinfo() from a php page served by your webserver. cgi/php.ini, in your situation, will most likely not be used. Using two distinct php.ini files (one for CLI, and the other one to serve pages from your webserver) is done quite often, and has one main advantages : it allows you to have different configuration values in each case.
Typically, in the php.ini file that’s used by the web-server, you’ll specify a rather short max_execution_time : web pages should be served fast, and if a page needs more than a few dozen seconds (30 seconds, by default), it’s probably because of a bug – and the page’s generation should be stopped.
On the other hand, you can have pretty long scripts launched from your crontab (or by hand), which means the php.ini file that will be used is the one in cli/, For those scripts, you’ll specify a much longer max_execution_time in cli/php.ini than you did in fpm/php.ini, max_execution_time is a common example ; you could do the same with several other configuration directives, of course.
: php.ini: which one?
How to know HTTP or HTTPS in PHP?
How to check whether the page is called from ‘https’ or ‘http’ in PHP ?
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The purpose of this article is to check whether the page is called from ‘HTTPS’ or ‘HTTP’, we can use the following two approaches. Approach 1: Check if the connection is using and if the value of $_SERVER is set, then we can say that the connection is secured and called from ‘HTTPS’.
- If the value is empty, this means the value is set to ‘0′ or ‘off’ then we can say that the connection is not secured and the page is called from ‘HTTP’.
- SERVER is an array which contain all the information about request headers, paths, and script locations.
- It will have a ‘non-empty’ value if the request was sent through HTTPS and empty or ‘0′ if the request was sent through HTTP.
Syntax: if (isset($_SERVER)) else Flowchart: Flowchart 1 Example:
Output: Warning : Connection is not secured,Page is called from HTTP Approach 2: A Problem with the earlier approach is that in some servers, the $_SERVER is undefined and this could lead to an error message while checking that the page is called from ‘HTTPS’ or from ‘HTTP’. Flowchart 2 Example:
Output: Connection is not secured and page is called from HTTP
- Last Updated : 17 Mar, 2021
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: How to check whether the page is called from ‘https’ or ‘http’ in PHP ?
How to check SSL in PHP?
Use PHP to check if page was accessed with SSL To use PHP to check if the page was accessed without SSL you can check the port number. // Most encrypted web sites use port 443 if ($_SERVER==443) elseif (isset($_SERVER)) This assumes your server is configured with the SERVER_PORT environment variable and that the encrypted version of your web site is hosted on port 443.
It also assumes your server is not behind a load balancer. If your server is behind a load balancer, you might need a more advanced solution such as this one that does not rely on custom HTTP headers which can vary from one load balancer to the next: // Set secure cookie to detect HTTPS as cookie will not exist otherwise.
Add this to the top of your page right after : Then add the following to your PHP script if you want browsers to remember to always use HTTPS when accessing your site: header(‘strict-transport-security: max-age=126230400’); or if you want browsers to have your preferences preloaded use: header(‘strict-transport-security: max-age=126230400; preload’);// HTTPS will always be used! If you use the preload feature you will need to submit your web site to be included in Chrome’s HSTS preload list so that browsers come preloaded with your web site preferences.
If you use preload, it’s also advisable to host your site on the naked domain without the www. This is because it’s usually easier for most people to type in your domain without the www, and with preload your web site loads without the need of a tedious redirect since https is already the default.