Rasmus Lerdorf created the PHP compiler (Hypertext Preprocessor) in 1994, which is a commonly used server scripting language.

Characteristics

  • Almost all common databases, including MySQL, PostgreSQL, Oracle, Sybase, Informix, and Microsoft SQL Server, may be integrated with this free powerful tool for creating dynamic and interactive websites.
  • The syntax is similar to that of C, and it is simple to learn.
  • It is a scripting language that is object-oriented.
  • It can be embedded in HTML with ease.
  • It is a language that has been loosely typed.

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Example

<?php

echo "Hello, world!!!!"

?>

Output

3-php-1

The computer's CPU can directly run compiled code, that is, the executable code is written in the native language of the CPU.

Interpreted language code must be translated from any format to CPU machine instructions at runtime. A PHP compiler interpreter is in charge of this translation.

It would be incorrect to argue that a language is interpreted or compiled because interpretation and compilation are both characteristics of the language's implementation, not of the language itself. As a result, you can compile or interpret any language, depending on the technology used.

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Example

<?php

$link = mysqli_connect("localhost", "root", "", "Mydb");

if ($link == = false) {

die("ERROR: Could not connect. "

.mysqli_connect_error());

}

$sql = "SELECT * FROM Data";

if ($res = mysqli_query($link, $sql)) {

if (mysqli_num_rows($res) > 0) {

echo "<table>";

echo "<tr>";

echo "<th>Firstname</th>";

echo "<th>Lastname</th>";

echo "<th>age</th>";

echo "</tr>";

while ($row = mysqli_fetch_array($res)) {

echo "<tr>";

echo "<td>".$row['Firstname']."</td>";

echo "<td>".$row['Lastname']."</td>";

echo "<td>".$row['Age']."</td>";

echo "</tr>";

}

echo "</table>";

mysqli_free_res($res);

}

else {

echo "No matching records are found.";

}

}

else {

echo "ERROR: Could not execute $sql. "

.mysqli_error($link);

}

mysqli_close($link);

?>

Output

/3-php-2

What Is a PHP Compiler?

A PHP compiler is a specific type of program that converts PHP statements into machine-level language which the system's processor can understand. Any system's processor only understands binary code, which means the compiler translates the high-level language into binary code that the processor can comprehend and interpret. Without a compiler, any program is useless. The compiler, which compiles the program written in it to the machine level language, is included in all IDEs that give a comprehensive platform to edit and run the program. In reality, the compiler is nothing more than a software that aids in the transformation of anything written using the statements.

The WHERE clause in PHP compiler can be used to incorporate numerous conditions in one or more tables separated by commas. However, it is an optional part of the SELECT statement.

  • In a single SELECT command, you can get one or more fields.
  • Fields can be replaced with a star (*). SELECT will return all fields in this scenario.
  • The WHERE clause allows you to specify any criteria.
  • You can use OFFSET to establish a starting point for SELECT to return records from. The offset is set to zero by default.
  • The LIMIT attribute can be used to limit the number of results.

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Example

<html>

   <head>

      <title>Creating MySQL Table</title>

   </head>

   <body>

      <?php

         $dbhost = 'localhost';

         $dbuser = 'root';

         $dbpass = 'root@123';

         $dbname = 'TUTORIALS';

         $mysqli = new mysqli($dbhost, $dbuser, $dbpass, $dbname);

         if($mysqli→connect_errno ) {

            printf("Connect failed: %s<br />", $mysqli→connect_error);

            exit();

         }

         printf('Connected successfully.<br />');

         $sql = "SELECT tutorial_id, tutorial_title, tutorial_author, submission_date FROM tutorials_tbl";

         $result = $mysqli->query($sql); 

         if ($result->num_rows > 0) {

            while($row = $result->fetch_assoc()) {

               printf("Id: %s, Title: %s, Author: %s, Date: %d <br />", 

                  $row["tutorial_id"], 

                  $row["tutorial_title"], 

                  $row["tutorial_author"],

                  $row["submission_date"]);               

            }

         } else {

            printf('No record found.<br />');

         }

         mysqli_free_result($result);

         $mysqli→close();

      ?>

   </body>

</html>

Output

3-php-3

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Conclusion

This was all about the PHP compiler that you must know. If you are planning a career in the field of PHP compiler designing, then the course from Simplilearn can help you accelerate your prospects. The course is designed to offer you detailed outcomes and help you land a job and earn a handsome salary in reputed organizations. 

PHP compiler allows you to write, run, and share PHP code for free. It is one of the most powerful and feature-rich online PHP compilers available, and it's currently running on version 7. It's easy and quick to get started with a PHP compiler. When you select PHP as the language, the editor displays a sample boilerplate code. There are also reference programs in the PHP compiler, where you can seek sample programs and begin learning. 

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