Java, PHP

PHP – Run a Java Program in PHP

11 Comments

Running a Java program in PHP just like running the shell command as i mentioned yesterday.

PHP – Run Shell Command

But i have spent a morning to verify if the Java works. =.=
Here is a sample PHP which will echo the Java version in browser.

java_version.php

<?php
        // Show whoami
        $output = shell_exec("whoami");
        echo "<strong>WHOAMI</strong>";
        echo "<hr/>";
        echo "$output<br/><br/><br/><br/>";

        // Show The Java Version Before Setting Environmental Variable
        $output = shell_exec("java -version 2>&1");
        echo "<strong>Java Version Before Setting Environmental Variable</strong>";
        echo "<hr/>";
        echo "$output<br/><br/><br/><br/>";

        // Set Enviromental Variable
        $JAVA_HOME = "/usr/local/jdk1.5.0_15";
        $PATH = "$JAVA_HOME/bin:/usr/local/bin:/usr/bin:/bin";
        putenv("JAVA_HOME=$JAVA_HOME");
        putenv("PATH=$PATH");

        // Show The Java Version After Setting Environmental Variable
        $output = shell_exec("java -version 2>&1");
        echo "<strong>Java Version After Setting Environmental Variable</strong>";
        echo "<hr/>";
        echo $output;
?>

Running Enviroment

  • Ubuntu 8.04
  • PHP 5.2.4-2ubuntu5.6
  • JDK 1.5.0_15

Result

 

You can see that the user is www-data and the default JDK is OpenJDK.

SO WHAT MAKES ME SPEND A MORNING TO VERIFY THAT?
Answer: java -version 2>&1

Now i know that the Java Version is returned in stderr… =.=

Done =)

11 thoughts on “PHP – Run a Java Program in PHP”

  1. Error when I run $output = shell_exec(“java -version 2>&1”);
    Error occurred during initialization of VM Unable to load native library: libjava.jnilib

    What shoud i do 😦

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    Reply

  5. this is what I tried to do:
    $output = shell_exec(“java -jar java.jar”);
    echo $output;
    but it seems return nothing.
    However, I tried to run it via command line, “java -jar java.jar” and it run normally

    ps: the java.jar just a exe file that will print “Hello world”

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    1. U have to check if your webserver user (www-data in ubuntu) has the right to run the java.jar, you also need to set the $JAVA_HOME and the $PAHT env variables for that webserver user.

      Does it help?

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      Reply

  6. can’t i compile java program using
    filename : javaphp.php

       <?php

        $output = shell_exec("javac test.java");
      
        echo "<strong>WHOAMI</strong>";
        echo "";
        echo "$output";
?>

    file name : test.java

    class test {
    public static void main(String[] args) {
        System.out.println("Hello World!");
    }
}

    my javaphp and test files are in same folder in /opt/lampp/htdocs/javaphp
    and i am entering the address localhost/javaphp/javaphp.php
    End up with nothing output . i already have javasetup in my computer .

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    1. “javac test.java” will compile test.java into test.class only. If you want to execute the java program you should run

      java test

      Make sure you have the test.class compiled.

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      Reply

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