How to make command on php?

[gaurav19]

hello friends, I know the php language, but how can I got command over this language?

[seo-webservices]

To gain command over the PHP language, here are a few steps you can follow:

1. Start with the basics: Familiarize yourself with the fundamental concepts of PHP such as variables, data types, functions, and control structures. You can find online tutorials, dоcumentation, or even enroll in a PHP course to get started.

2. Practice coding: The more you practice, the better you will get. Write small programs, experiment with different concepts, and solve coding problems regularly. This will help you understand PHP syntax and improve your problem-solving skills.

3. Study PHP frameworks: Explore popular PHP frameworks like Laravel, Symfony, or CodeIgniter. Frameworks provide structure and help you write clean, maintainable code. Learning a framework can be beneficial in building complex web applications efficiently.

4. Read PHP dоcumentation: PHP has extensive dоcumentation available online. It covers all aspects of the language, including functions, classes, error handling, and best practices. Familiarize yourself with the dоcumentation to understand the language in-depth and use it as a reference while coding.

5. Join developer communities: Engaging with PHP developer communities, forums, or online groups can provide valuable insights and help you connect with experienced developers. You can ask questions, share your code, and learn from others' experiences.

6. Contribute to open-source projects: Contributing to open-source PHP projects can be an excellent way to improve your skills. It allows you to work on real-world projects, collaborate with other developers, and gain practical experience while making a positive impact on the community.


In PHP, the term "script" generally refers to a PHP file that contains a set of instructions or code that is executed when the script is run. To run a PHP script, you need to follow these steps:

1. Create a new file with a .php extension, for example, "myscript.php".

2. Open the file in a text editor and write your PHP code within the opening and closing PHP tags (`<?php` and `?>`).

3. Save the file.

4. Open a terminal or command prompt.

5. Navigate to the directory where the PHP script is saved using the `cd` command. For example, if your script is saved in the "dоcuments" directory:
```
cd dоcuments
```

6. Execute the PHP script by running the following command:
```
php myscript.php
```

The PHP interpreter will execute the code written in the "myscript.php" file, and you will see the output or results of the script displayed in the terminal.

1. PHP Command-Line Interface (CLI): Running PHP scripts from the command line requires PHP's Command-Line Interface (CLI) to be installed on your system. Most PHP installations come with CLI enabled by default.

2. Interpreting PHP Scripts: When you run a PHP script from the command line using the `php` command, the PHP interpreter reads and executes the PHP code line by line.

3. Outputting Results: PHP scripts can generate output that is displayed in the terminal. You can use PHP's `echo` or `print` statements to output text or variables. For example:
```php
<?php
echo "Hello, World!";
?>
```
Running this script will display "Hello, World!" in the terminal.

4. Command-Line Arguments: You can pass command-line arguments to PHP scripts using the `$argv` array. `$argv[0]` represents the name of the script itself, while subsequent elements (`$argv[1]`, `$argv[2]`, etc.) hold the supplied arguments. For example, if you run the script as `php myscript.php arg1 arg2`, you can access `arg1` and `arg2` within the script using `$argv[1]` and `$argv[2]`, respectively.

5. Error Reporting: When running PHP scripts from the command line, error messages and warnings are displayed in the terminal. This can help with debugging and troubleshooting your script.

6. Exiting the Script: You can use the `exit` or `die` functions to terminate the script execution at any point. For example:
```php
<?php
// Some code...

if ($condition) {
    exit("Script terminated based on condition.");
}

// More code...
?>
```

details about running PHP scripts from the command line:

1. Passing User Input: You can read user input from the command line using PHP's built-in `fgets()` function. It allows you to prompt the user for input and retrieve their response. Here's an example:
```php
<?php
echo "Enter your name: ";
$name = fgets(STDIN);
echo "Hello, $name";
?>
```
Running this script will prompt the user to enter their name, and the script will display a personalized greeting.

2. Using Command-Line Options: PHP provides the `getopt()` function to parse command-line options and arguments. It allows you to define custom flags, options, and their corresponding values. Here's a basic example:
```php
<?php
$options = getopt("o:t:f:");

if (isset($options['o'])) {
    echo "Output file: " . $options['o'];
}

if (isset($options['t'])) {
    echo "Type: " . $options['t'];
}

if (isset($options['f'])) {
    echo "File: " . $options['f'];
}
?>
```
Running this script with command-line options like `-o output.txt -t pdf -f myfile.txt` will display the specified options and their values.

3. Including External Files: PHP scripts run from the command line can include and use external files using the `require`, `include`, `require_once`, or `include_once` statements. This allows you to modularize your code and reuse functions or classes defined in separate files.

4. Redirecting Output: By default, when you run a PHP script from the command line, the output is displayed directly in the terminal. However, you can redirect the output to a file using the shell's output redirection operators. For instance, to save the output to a file named "output.txt," you can run the script as follows:
```
php myscript.php > output.txt
```

some more details about running PHP scripts from the command line:

1. Defining Shebang: On Unix-like operating systems, you can make a PHP script executable by adding a shebang line at the beginning of the file. This allows you to execute the script directly without explicitly invoking the PHP interpreter. Here's an example:
```php
#!/usr/bin/env php
<?php
// Your PHP code here
?>
```
To make the script executable, you need to give it proper permissions using the `chmod` command. For example:
```
chmod +x myscript.php
```
Afterwards, you can run the script directly as `./myscript.php`.

2. Running PHP Interactive Shell (REPL): PHP provides an interactive shell where you can experiment with PHP code in real-time. To access the PHP REPL, simply run the `php` command without specifying a script file. This allows you to quickly test small snippets of code or try out PHP features before incorporating them into your scripts.

3. Using External Libraries: PHP allows you to include external libraries and frameworks in your command-line scripts using the `require` or `include` statements. This allows you to leverage existing packages and components to enhance the functionality of your PHP scripts.

4. Debugging with Xdebug: Xdebug is a powerful PHP debugging tool that can be used even when executing PHP scripts from the command line. It provides features like breakpoints, stack traces, variable inspection, and profiling. By configuring Xdebug properly, you can debug and troubleshoot your PHP scripts more effectively.

5. Automating Tasks with Cron Jobs: PHP scripts can be scheduled to run automatically at specified intervals using cron jobs. Cron is a task scheduler available on Unix-like systems. By setting up a cron job, you can automate various tasks such as database backups, data processing, or periodic script execution.

[johnnydhepp]

Just type like this <!-- name -->.

[Agenore Lucciano]

Gaurav your HTML concepts must be clear for getting hands on PHP and w3schools.com is the best source for learning basic concepts in HTML and PHP.

[Luca tall]

you can make your code command by using "<!--   -->".

For example
<?php
<!--
echo "hello world";
echo "hello world";
-->
?>

[azazely85]

you can make your code command by using "<!--   -->".

For example
<?php
<!--
echo "hello world";
echo "hello world";
-->
?>

no
<?
//comment
/* cooment
comment
*/
?>

[Dewlance]

Learn tutorials and look at youtube videos, there are plenty of tutorials on YT.

I learn php from a website who give step by step tutorials and I was take a print out and start learning it but still I am beginner since my job is not a related to programming but I was learn php because of some times customers need help for fixing their website.