Tag: Logic

Stripe API implementation error/exception handling

Posted on 23 May, 2017 in Exception Handling, Payment Gateway, Payment Gateway, PHP

Stripe error handling

Stripe API libraries raise exceptions for many reasons, such as a failed charge, invalid parameters, authentication errors, and network unavailability. The Stripe recommends for writing code that gracefully handles all possible API exceptions.

Below Error Handling code is compatible with latest stripe API version

<?php
...
try {
  // Use Stripe's library to make requests...
} catch(\Stripe\Error\Card $e) {
  // Since it's a decline, \Stripe\Error\Card will be caught
  $body = $e->getJsonBody();
  $err  = $body['error'];

  print('Status is:' . $e->getHttpStatus() . "\n");
  print('Type is:' . $err['type'] . "\n");
  print('Code is:' . $err['code'] . "\n");
  // param is '' in this case
  print('Param is:' . $err['param'] . "\n");
  print('Message is:' . $err['message'] . "\n");
} catch (\Stripe\Error\RateLimit $e) {
  // Too many requests made to the API too quickly
} catch (\Stripe\Error\InvalidRequest $e) {
  // Invalid parameters were supplied to Stripe's API
} catch (\Stripe\Error\Authentication $e) {
  // Authentication with Stripe's API failed
  // (maybe you changed API keys recently)
} catch (\Stripe\Error\ApiConnection $e) {
  // Network communication with Stripe failed
} catch (\Stripe\Error\Base $e) {
  // Display a very generic error to the user, and maybe send
  // yourself an email
} catch (Exception $e) {
  // Something else happened, completely unrelated to Stripe
}
...
?>

<?php

...

try {

// Use Stripe's library to make requests...

} catch(\Stripe\Error\Card $e) {

// Since it's a decline, \Stripe\Error\Card will be caught

$body = $e->getJsonBody();

$err = $body['error'];

print('Status is:' . $e->getHttpStatus() . "\n");

print('Type is:' . $err['type'] . "\n");

print('Code is:' . $err['code'] . "\n");

// param is '' in this case

print('Param is:' . $err['param'] . "\n");

print('Message is:' . $err['message'] . "\n");

} catch (\Stripe\Error\RateLimit $e) {

// Too many requests made to the API too quickly

} catch (\Stripe\Error\InvalidRequest $e) {

// Invalid parameters were supplied to Stripe's API

} catch (\Stripe\Error\Authentication $e) {

// Authentication with Stripe's API failed

// (maybe you changed API keys recently)

} catch (\Stripe\Error\ApiConnection $e) {

// Network communication with Stripe failed

} catch (\Stripe\Error\Base $e) {

// Display a very generic error to the user, and maybe send

// yourself an email

} catch (Exception $e) {

// Something else happened, completely unrelated to Stripe

}

...

For old stripe versions i.e Stripe API v1.18.0 use below Error Handling code

<?php
...
try {
  // Use Stripe's library to make requests...
} catch(Stripe_CardError $e) {			
  // Since it's a decline, \Stripe\Error\Card will be caught
  print('Message is:' . $e->getMessage() . "\n");
} catch (Stripe_InvalidRequestError $e) {
  // Invalid parameters were supplied to Stripe's API
} catch (Stripe_AuthenticationError $e) {
  // Authentication with Stripe's API failed
  // (maybe you changed API keys recently)
} catch (Stripe_ApiConnectionError $e) {
  // Network communication with Stripe failed
} catch (Stripe_Error $e) {
  // Display a very generic error to the user, and maybe send
  // yourself an email
} catch (Exception $e) {
  // Something else happened, completely unrelated to Stripe
}
...
?>

<?php

...

try {

// Use Stripe's library to make requests...

} catch(Stripe_CardError $e) {

// Since it's a decline, \Stripe\Error\Card will be caught

print('Message is:' . $e->getMessage() . "\n");

} catch (Stripe_InvalidRequestError $e) {

// Invalid parameters were supplied to Stripe's API

} catch (Stripe_AuthenticationError $e) {

// Authentication with Stripe's API failed

// (maybe you changed API keys recently)

} catch (Stripe_ApiConnectionError $e) {

// Network communication with Stripe failed

} catch (Stripe_Error $e) {

// Display a very generic error to the user, and maybe send

// yourself an email

} catch (Exception $e) {

// Something else happened, completely unrelated to Stripe

}

...

For more details please check .

Tags: Error Handling, Exception Handling, Logic, Payment Gateway, PHP, Stripe, Stripe Error Handling, Stripe Exception Handling, Stripe.js, Web Development

How to Copy directory/files from windows command line/prompt

Posted on 7 April, 2017 in General, Utilities

COPY – It will allow you to quickly copy files from one location to another location.

Syntex > copy source_file_name destination_file_name

XCOPY – The xcopy command allows you to copy files and directories from one location to another location. This makes it much more suitable for copying folders. xcopy also has many modifiers which gives advanced users more control over the copying process.

Syntex > xcopy /E /I source_dir_name destination_die_name

Reference of /E and /I
/E – This option makes sure that empty subfolders are copied to the destination.
/I – Avoids prompting if the destination is a folder or file.

Tags: command prompt, data copy, data Export, Logic, windows command line

How can I offer a gzipped csv file for download using PHP?

Posted on 13 October, 2016 in General, PHP, Utilities

Question:

I have a PHP script that creates csv file from the db. I would like to have the script to create the csv data and immediately make a .gzip file available for download. Can you please give me some ideas?

Answer:

You can easily apply gzip compression with the gzencode function.

<?
header("Content-Disposition: attachment; filename=your_file_name.xml.gz");
header("Content-type: application/x-gzip");

echo gzencode($csvToCompress);
?>

header("Content-Disposition: attachment; filename=your_file_name.xml.gz");

header("Content-type: application/x-gzip");

echo gzencode($csvToCompress);

Tags: data Export, Download zip, Logic, Web Development

How to swap two numbers without using a temporary variable in PHP ?

Posted on 26 February, 2016 in PHP

We have two variables (parameters) “x” & “y”, here we do swap of two variables without using a third variable (parameters).

1) Swap numbers using Arithmetic Operators –
In below example we use addition and subtraction operation to do swap of 2 numbers

<?php
function swap_me()
{
    $x = 25;
    $y = 14;

    echo "Before Swapping: x = ".$x.", y = ".$y;

    // Code to swap "$x" and "$y"
    $x = $x + $y;  // $x now becomes 39
    $y = $x - $y;  // $y becomes 25
    $x = $x - $y;  // $x becomes 14

    echo "<BR>After Swapping: x = ".$x.", y = ".$y;
}

// call the function
swap_me();
?>

Output:
Before Swapping: x = 25, y = 14
After Swapping: x = 14, y = 25

<?php

function swap_me()

{

$x = 25;

$y = 14;

echo "Before Swapping: x = ".$x.", y = ".$y;

// Code to swap "$x" and "$y"

$x = $x + $y; // $x now becomes 39

$y = $x - $y; // $y becomes 25

$x = $x - $y; // $x becomes 14

echo "<BR>After Swapping: x = ".$x.", y = ".$y;

}

// call the function

swap_me();

Output:

Before Swapping: x = 25, y = 14

After Swapping: x = 14, y = 25

In below example we use multiplication and division operation to do swap of 2 numbers

<?php
function swap_me()
{
    $x = 25;
    $y = 14;

    echo "Before Swapping: x = ".$x.", y = ".$y;
 
    // Code to swap "$x" and "$y"
    $x = $x * $y;  // x now becomes 350
    $y = $x / $y;  // y becomes 25
    $x = $x / $y;  // x becomes 14
 
    echo "<BR>After Swapping: x = ".$x.", y = ".$y;
}

// call the function
swap_me();
?>

Output:

Before Swapping: x = 25, y = 14
After Swapping: x = 14, y = 25

<?php

function swap_me()

{

$x = 25;

$y = 14;

echo "Before Swapping: x = ".$x.", y = ".$y;

// Code to swap "$x" and "$y"

$x = $x * $y; // x now becomes 350

$y = $x / $y; // y becomes 25

$x = $x / $y; // x becomes 14

echo "<BR>After Swapping: x = ".$x.", y = ".$y;

}

// call the function

swap_me();

Output:

Before Swapping: x = 25, y = 14

After Swapping: x = 14, y = 25

2) Swap numbers using Bitwise XOR Operators –

<?php
function swap_me()
{
    $x = 25;
    $y = 14;

    echo "Before Swapping: x = ".$x.", y = ".$y;
 
    // Code to swap 'x' (11001) and 'y' (1110)
    $x = $x ^ $y;  // x now becomes 15 (100111)
    $y = $x ^ $y;  // y becomes 10 (11001)
    $x = $x ^ $y;  // x becomes 5 (1110)
 
    echo "<BR>After Swapping: x = ".$x.", y = ".$y;
}

// call the function
swap_me();
?>

Output:

Before Swapping: x = 25, y = 14
After Swapping: x = 14, y = 25

<?php

function swap_me()

{

$x = 25;

$y = 14;

echo "Before Swapping: x = ".$x.", y = ".$y;

// Code to swap 'x' (11001) and 'y' (1110)

$x = $x ^ $y; // x now becomes 15 (100111)

$y = $x ^ $y; // y becomes 10 (11001)

$x = $x ^ $y; // x becomes 5 (1110)

echo "<BR>After Swapping: x = ".$x.", y = ".$y;

}

// call the function

swap_me();

Output:

Before Swapping: x = 25, y = 14

After Swapping: x = 14, y = 25

Note:
In multiplication, we can not able to use 0 (zero), because of it make multiplication result as zero.

Your comments are appreciated!

Till than Happy Coding 🙂

Tags: Logic, PHP, Swap Numbers, Web Development

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Tag: Logic

Stripe API implementation error/exception handling

How to Copy directory/files from windows command line/prompt

How can I offer a gzipped csv file for download using PHP?

How to swap two numbers without using a temporary variable in PHP ?