Detailed explanation of how PHP calls its own Java program, Detailed explanation of how PHP calls its own Java program

The example in this article describes the implementation method of PHP calling its own Java program. Share it with everyone for your reference, the details are as follows:

It goes without saying that I need to install jdk at the beginning. I installed java ee 5 jdk

1. Unzip the downloaded php-java-bridge_5.2.2_j2ee.zip. There is a JavaBridge.war and open it directly with winrar. Go to WEB-INF/lib/JavaBridge.jar and copy this jar package to the ext/ directory of your php directory.

2. Open the war package, there is a java folder inside, copy it all to your PHP project, such as /demo/java

3. The current version is VMBridge. If you want PHP to call the java class, you must first start JavaBridge,

Call java –jar JavaBridge.jar from the command line or double-click JavaBridge.jar and select listening port 8080 in the pop-up window

For easy startup in the future, I created a new bat file under ext/ with the following content:

@echo off
start javaw -jar JavaBridge.jar

After saving, double-click to start. There will be a prompt box to select vmbridge port. The default is 8080. Just click ok

4. Create a new test.php under /demo/ with the following content:

<&#63;php
require_once("java/Java.inc");
header("content-type:text/html; charset=utf-8″);
// get instance of Java class java.lang.System in PHP
$system = new Java('java.lang.System');
$s = new Java("java.lang.String", "php-java-bridge config…<br><br>");
echo $s;
// demonstrate property access
print 'Java version='.$system->getProperty('java.version').' <br>';
print 'Java vendor=' .$system->getProperty('java.vendor').' <br>';
print 'OS='.$system->getProperty('os.name').' '.
$system->getProperty('os.version').' on '.
$system->getProperty('os.arch').' <br>';
// java.util.Date example
$formatter = new Java('java.text.SimpleDateFormat',
"EEEE, MMMM dd, yyyy 'at' h:mm:ss a zzzz");
print $formatter->format(new Java('java.util.Date'));
&#63;>

5. Start apache and view http://localhost/demo/test.php in the browser

You will see the following information:
Copy code The code is as follows: php-java-bridge config…
Java version=1.6.0_10
Java vendor=Sun Microsystems Inc.
OS=Windows Vista 6.0 on x86
Sunday, November 23, 2008 at 4:31:49 PM China Standard Time

Custom JAR:

package ttt;
public class phptest{
 /**
 * A sample of a class that can work with PHP
 * NB: The whole class must be public to work,
 * and of course the methods you wish to call
 * directly.
 *
 * Also note that from PHP the main method
 * will not be called
 */
 public String foo;
 /**
 * Takes a string and returns the result
 * or a msg saying your string was empty
 */
 public String test(String str) {
  if(str.equals("")) {
   str = "Your string was empty. ";
  }
  return str;
 }
 /**
 * whatisfoo() simply returns the value of the variable foo.
 */
 public String whatisfoo() {
  return "foo is " + foo;
 }
 /**
 * This is called if phptest is run from the command line with
 * something like
 * java phptest
 * or
 * java phptest hello there
 */
 public static void main(String args[]) {
  phptest p = new phptest();
  if(args.length == 0) {
   String arg = "";
   System.out.println(p.test(arg));
  }else{
   for (int i = 0; i < args.length; i++) {
    String arg = args[i];
    System.out.println(p.test(arg));
   }
  }
 }
}

Generate it as JAR and copy it to the D drive.

/demo/index2.php

<&#63;
require_once("java/Java.inc");
java_require("D://1.jar");
$myj = new Java("ttt.phptest");
echo "Test Results are <b>" . $myj->test("Hello World") . "</b>";
$myj->foo = "A String Value";
echo "You have set foo to <b>" . $myj->foo . "</b><br>\n";
echo "My java method reports: <b>" . $myj->whatisfoo() . "</b><br>\n";
&#63;>

View http://localhost/demo/index2.php in your browser

Method 2: php_java.dll needs to configure php.ini, the new version of php-java-bridge does not have dll files

First make sure that your PHP and Apache servers and JDK (or JRE are also acceptable) have been installed

Download php-java-bridge online (find it yourself or http://sourceforge.net/project/showfiles.php?group_id=117793)

Decompress the downloaded php-java-bridge. After decompression, there will be a JavaBridge.war in the folder. Then decompress this JavaBridge.war in the same way (win rar can decompress it)
After decompression, you can find java-x86-windows.dll from the cgi folder in the WEB-INF folder, and JavaBridge.jar

Copy java-x86-windows.dll and JavaBridge.jar to the PHP plug-in folder (in my case it is C:/AppServphp/ext), and change java-x86-windows.dll to php_java.dll

Modify php.ini file

If php.ini does not originally have the following content, please add it yourself. If it originally has the following content, please modify it to the following [I am using JDK]

extension=php_java.dll

[Java]
;java.java = "C:\jdk1.6.0_13\bin\java"
java.class.path = "D:\php\ext\JavaBridge.jar;c:\myclasses" c:\myclasses可自定義，用來存放自己寫的JAVA文件 
java.java_home = "C:\jdk1.6.0_13\jre"
java.library = "d:\jdk1.2.2\jre\bin\server\jvm.dll"
java.library.path = "D:\php\ext"

Restart Apache and check phpinfo

java
java support  Enabled
java bridge  3.0.8
java.java_home  C:\jdk1.6.0_13
java.java  C:\jdk1.6.0_13\bin\java
java.log_file  <stderr>
java.log_level  no value (use backend's default level)
java.ext_java_compatibility  Off
java command  C:\jdk1.6.0_13\bin\java -Djava.library.path=D:\php\ext -Djava.class.path=D:\php\ext/JavaBridge.jar -Djava.awt.headless=true php.java.bridge.JavaBridge INET_LOCAL:0 2
java status  running
java server  9267

Check whether the second to last item, java status, is not running (this is because you have not started JavaBridge.jar). If it changes to running <—- it means JavaBridge.jar has been started and php-java-bridge can be officially used

Execute if not started:

Because it is impossible to manually start JavaBridge.jar every time you turn on the computer

So we write a batch process with the following content

@echo off
start javaw -jar JavaBridge.jar

Save it as phpJavaBridge.bat and also put it in the PHP plug-in folder (here is C:AppServ/php/ext)

Create a shortcut for the file and put the created shortcut into startup (here is C:/Documents and Settings/All Users/"Start"/Menu/Program Startup)

In this way, phpJavaBridge.bat in the C:AppServphpext folder will be automatically launched every time the computer is turned on

Simple example

<&#63;
$system=new Java('java.lang.System');
echo "java版本".$system->getProperty('java.version')."<BR>";
echo "發(fā)行廠商".$system->getProperty('java.vendor')."<BR>";
echo "作業(yè)系統(tǒng)版本".$system->getProperty('os.name')."<BR>";
echo "java版本".$system->getProperty('os.version')."<BR>";
echo "java版本".$system->getProperty('os.arch')."<BR>";
&#63;>

Or find test.php in php-java-bridge and check the effect at http://localhost/test.php

<&#63;php
$system=new Java("java.lang.System");
print "Java version=".$system->getProperty("java.version")." <br>";
&#63;>

[java]
extension=PHP_java.dll
java.library.path=c:webPHP4extensions
java.class.path="c:webPHP4extensionsjdk1.2.2PHP_java.jar;c:myclasses" 

Add extension=PHP_java.dll to PHP.INI, and in [java], set java.class.path so that it points to PHP_java.jar. If you use the new JAVA class, you should also save Enter this path. In this example, we use the c:myclasses directory.

Test the environment and create the following PHP file:

<&#63;php
$system = new Java("java.lang.System");
print "Java version=".$system->getProperty("java.version")." <br>n";
print "Java vendor=".$system->getProperty("java.vendor")." <p>nn";
print "OS=".$system->getProperty("os.name")." ".
$system->getProperty("os.version")." on ".
$system->getProperty("os.arch")." <br>n";
$formatter = new Java("java.text.SimpleDateFormat","EEEE,
MMMM dd, yyyy 'at' h:mm:ss a zzzz");
print $formatter->format(new Java("java.util.Date"))."n";
&#63;> 

If you installed it correctly, you will see the following message:
Copy code The code is as follows: Java version=1.2.2
Java vendor=Sun Microsystems Inc.
OS=Windows 95 4.10 on x86
Wednesday, October 18, 2000 at 10:22:45 AM China Standard Time

It is important to understand how to call JAVA. The next step is to create your own JAVA file and let PHP call it. The java.class.path of the JAVA file is very important

Create and use your own JAVA classes [Note case]

Creating your own JAVA classes is easy. Create a new phptest.java file and place it in your java.class.path directory [c:myclasses]. The file content is as follows:

public class phptest{
 /**
 * A sample of a class that can work with PHP
 * NB: The whole class must be public to work,
 * and of course the methods you wish to call
 * directly.
 *
 * Also note that from PHP the main method
 * will not be called
 */
 public String foo;
 /**
 * Takes a string and returns the result
 * or a msg saying your string was empty
 */
 public String test(String str) {
  if(str.equals("")) {
   str = "Your string was empty. ";
  }
  return str;
 }
 /**
 * whatisfoo() simply returns the value of the variable foo.
 */
 public String whatisfoo() {
  return "foo is " + foo;
 }
 /**
 * This is called if phptest is run from the command line with
 * something like
 * java phptest
 * or
 * java phptest hello there
 */
 public static void main(String args[]) {
  phptest p = new phptest();
  if(args.length == 0) {
   String arg = "";
   System.out.println(p.test(arg));
  }else{
   for (int i = 0; i < args.length; i++) {
    String arg = args[i];
    System.out.println(p.test(arg));
   }
  }
 }
}

After creating this file, we need to compile this file and use the javac phptest.java command on the DOS command line.

In order to use PHP to test this JAVA class, we create a phptest.php file in the web directory with the following content:

<&#63;php
$myj = new Java("phptest");
echo "Test Results are <b>" . $myj->test("Hello World") . "</b>";
$myj->foo = "A String Value";
echo "You have set foo to <b>" . $myj->foo . "</b><br>\n";
echo "My java method reports: <b>" . $myj->whatisfoo() . "</b><br>\n";
&#63;>

如果你得到這樣的警告信息：java.lang.ClassNotFoundException error ，這就意味著你的 phptest.class 文件不在你的 java.class.path 目錄下。

注意的是 JAVA 是一種強制類型語言，而 PHP 不是，這樣我們在將它們融合時，容易導致錯誤，于是我們在向JAVA傳遞變量時，要正確指定好變量的類型。如：$myj->foo = (string) 12345678; or $myj->foo = "12345678″;

這只是一個很小的例子，你可以創(chuàng)建你自己的 JAVA 類，并使用 PHP 很好的調用它！關鍵在于理解java.class.path目錄的重要性。

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