Get last word from URL after a slash in PHP (www.xxx.com/about.php/THIS_WORD)

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PHP - Sign Request Data With OpenSSL Private Key Pair

Below is a PHP code snippet to sign request data with OpenSSL private key. It's used to handshake with server to communicate with the server.

function signRequestParams($options)
{
    $private_key = openssl_pkey_get_private(readServerFile("./XeroCerts/privatekey.pem"));
    $sbs = escapeUrlEntity(normalizeParameters($options));
    openssl_sign($sbs, $signature, $private_key);
    openssl_free_key($private_key);
    return base64_encode($signature);
}

function readServerFile($file_path)
{
    $fp = fopen($file_path, "r");
    $file_contents = fread($fp, 8192);
    fclose($fp);
    return $file_contents;
}

function normalizeParameters($parameters)
{
    $elements = array();
    ksort($parameters);
    foreach ($parameters as $paramName => $paramValue) {
        /* If name contains "be_ignored" will be ignored */
        if (preg_match('/be_ignored/', $paramName))
            continue;
        if (is_array($paramValue)) {
            sort($paramValue);
            foreach ($paramValue as $element)
                array_push($elements, escapeUrlEntity($paramName) . '=' . escapeUrlEntity($element));
            continue;
        }
        array_push($elements, escapeUrlEntity($paramName) . '=' . escapeUrlEntity($paramValue));
    }
    return join('&', $elements);
}

function escapeUrlEntity($string)
{
    if ($string === 0)
        return 0;
    if (empty($string))
        return '';
    if (is_array($string))
        throw new Exception('Array passed to escapeUrlEntity');

    $string = rawurlencode($string);
    $string = str_replace('+', '%20', $string);
    $string = str_replace('!', '%21', $string);
    $string = str_replace('*', '%2A', $string);
    $string = str_replace('\'', '%27', $string);
    $string = str_replace('(', '%28', $string);
    $string = str_replace(')', '%29', $string);
    return $string;
}

$options = array(
    "card.PAN" => "4564710000000004",
    "card.CVN" => "847",
    "card.expiryMonth" => "12",
    "card.expiryYear" => "20"
);

$signature = signRequestParams($options);
echo "Signature=$signature";

Output will be as below:

Signature=UC/uRPTaNxMV02a9I/KlWL/BA8..............6Fx1hjEYHWXN0U=

How to sign string as well sign request body with public key using Java

Below is a code snippet which will sign your request using Public key.

package com.pkm.src;

import Base64OutputStream;
import IOUtil;

import javax.crypto.Cipher;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.security.MessageDigest;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;

/**
 * Created by pritom on 24/05/2017.
 */
public class SignatureSigner {
    public static void main(String[] args) throws Exception {
        String certificateFile = ".....\\publickey.cer";
        String requestBody = "Param1=Value_Of_Param1&Param2=Value_Of_param2";
        String signature = encodeRSASHA1(certificateFile, requestBody);
        System.out.println("Signature=" + signature);
    }

    protected static String encodeRSASHA1(String certificateFile, String requestBody) throws Exception {
        FileInputStream certIn1 = new FileInputStream(certificateFile);
        CertificateFactory e = CertificateFactory.getInstance("X509");
        X509Certificate myCertificate = (X509Certificate) e.generateCertificate(certIn1);

        MessageDigest hashGen = MessageDigest.getInstance("SHA1");
        byte[] hash = hashGen.digest(requestBody.getBytes("UTF-8"));
        Cipher rsa = Cipher.getInstance("RSA/ECB/PKCS1Padding");
        rsa.init(1, myCertificate);
        byte[] signature = rsa.doFinal(hash);

        ByteArrayInputStream sigIn = new ByteArrayInputStream(signature);
        ByteArrayOutputStream sigOut = new ByteArrayOutputStream();
        Base64OutputStream base64Out = new Base64OutputStream(sigOut, "");
        IOUtil.copy(sigIn, base64Out);
        base64Out.close();
        return new String(sigOut.toByteArray(), "US-ASCII");
    }
}

Which will output as below:

Signature=7GNccit4cY+rs4t/S0WBv.........+w1rYdiEO8PxuR3SQ=

Half Round Shape SVG Example

Below is a code snippet for half round shape SVG example:

<svg version="1.1" height="200px" width="200px"  xmlns="http://www.w3.org/2000/svg" >
      <clipPath id="cut-off-bottom">
          <rect x="0" y="0" width="200" height="100" fill="red"/>
      </clipPath>

      <circle cx="100" cy="100" r="100" clip-path="url(#cut-off-bottom)"  fill="red"/>
 
  <clipPath id="cut-off-bottom2">
          <rect x="0" y="0" width="200" height="100" fill="red"/>
      </clipPath>

      <circle cx="100" cy="100" r="80" clip-path="url(#cut-off-bottom2)"  fill="blue"/>
</svg>

Install Composer as Portable on Windows

Its sometimes we need Composer in our system but we don't want to install another extra software in our machine. So below is a simple nice script to do it without any hassle. Just you need to create an file named "Composer-installer.bat" with content below in any of your directory and double click on it. It will install composer in your system.

@ECHO OFF
REM Installs Composer as portable

REM Set Home folder as Composer Global Configuration Folder
SET COMPOSER_HOME=%~dp0Home
if not exist %COMPOSER_HOME% md "%COMPOSER_HOME%"

REM If PHP Path Not Set Yet
set PATH=%PATH%;c:\xampp\php

REM Download Composer
php -r "readfile('https://getcomposer.org/installer');" | php

SET COMPOSER_BAT=%~dp0composer.bat
if not exist "%COMPOSER_BAT" (
 echo @ECHO OFF> "%COMPOSER_BAT%"
 echo SET COMPOSER_HOME=%%~dp0Home>> "%COMPOSER_BAT%"
 echo if not exist %%COMPOSER_HOME%% md "%%COMPOSER_HOME%%">> "%COMPOSER_BAT%"
 echo php "%%~dp0composer.phar" %%*>> "%COMPOSER_BAT%"
 echo EXIT /B %%ERRORLEVEL%%>> "%COMPOSER_BAT%"

)
call composer --version | findstr /i /r /c:"Composer......version"

REM Increases Composer Time-out
call composer --quiet config --global process-timeout 3000

REM Set Local folder for Composer Internal Cache
SET COMPOSER_LOCAL=%~dp0Local
if not exist %COMPOSER_LOCAL% md "%COMPOSER_LOCAL%"
call composer --quiet config --global cache-dir "%COMPOSER_LOCAL%"
pause

Growl Notification Example Web Application

Its now very easy to show our error or other types of messages in our web application easily. Growl is a nice plugin to display our target messages nicely in our web application. 

$('.error').click(function(event) {
    return $.growl.error({
        message: "Growl Error Message!"
    });
});
$('.notice').click(function(event) {
    return $.growl.notice({
        message: "Growl Notice Message!"
    });
});
$('.warning').click(function(event) {
    return $.growl.warning({
        message: "Growl Warning Message!"
    });
});

Download full example from here

AngularJS How to call controller function from outside of controller component

Its not a good practice to call AngularJS function from outside of its scope. But sometimes we need it badly. So there is a way around to do this easily.

You should note that scopes are initialized after the page is fully loaded, so calling methods from outside of scope should always be done after the page is loaded. Else you will not get to the scope at all. Below is a small code snippet to how you can achieve this easily:

var targetID = document.getElementById("AngularController");
angular.element(targetID).scope().init("Outside Controller");

Where "init" is function named in your controller as below:

var app = angular.module("myApp", []);
app.controller("AngularController", function($scope, $window) {
    $scope.init = function(res) {
        console.log("INIT INVOKED=" + res);
    };

    $scope.init("Controller Itself");
});

You can download full example from the link.