PHP code example of kambo / karsk

1. Go to this page and download the library: Download kambo/karsk library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

kambo / karsk example snippets



use Kambo\Karsk\ClassWriter;
use Kambo\Karsk\Opcodes;

$cw = new ClassWriter(0);
$cw->visit(
    Opcodes::V1_8,
    Opcodes::ACC_PUBLIC,
    "Helloworld",
    null,
    "java/lang/Object",
    null
);

$mw = $cw->visitMethod(Opcodes::ACC_PUBLIC, "<init>", "()V", null, null);
$mw->visitVarInsn(Opcodes::ALOAD, 0);

$mw->visitMethodInsn(Opcodes::INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
$mw->visitInsn(Opcodes::RETURN_);
$mw->visitMaxs(1, 1);
$mw->visitEnd();

$mainMethod = $cw->visitMethod(
    (Opcodes::ACC_PUBLIC + Opcodes::ACC_STATIC),
    "main",
    "([Ljava/lang/String;)V",
    null,
    null
);
$mainMethod->visitFieldInsn(Opcodes::GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
$mainMethod->visitLdcInsn("Hello world!");

$mainMethod->visitMethodInsn(
    Opcodes::INVOKEVIRTUAL,
    "java/io/PrintStream",
    "println",
    "(Ljava/lang/String;)V",
    false
);
$mainMethod->visitInsn(Opcodes::RETURN_);
$mainMethod->visitMaxs(2, 2);
$mainMethod->visitEnd();

$code = $cw->toByteArray();