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Example code of chromeheadlessio/php-client

Informations about the package php-client

ChromeHeadless.io - The PDF Generator Cloud Service

Focus on your application, save your time & server resources by off-loading the heavy PDF generation tasks to us. ChromeHeadless.io will deliver the beautiful and error-free PDFs for your professional customer's invoice, data reports and more..

How it works?

Our service is provided through REST APIs so virtually it can be used with any language and system. For convenience, we are constructing the client library for each of languages such as PHP. NodeJs, .Net and Python. So if you are using those languages, you may install the client library and provide it with your secret token created from your registered account. The client library will compress your HTML together with resources such as CSS and Javascript and send over to our server farms to generate PDF version. The high definition PDF will be sent back to you.

Advantages

There are number of advantages of using our system:

  1. No installation required: You do not have to install PhantomJS or Headless Chrome.
  2. Off-load heavy task: Headless Chrome or PhantomJS required certain amount of CPUs and RAM which you may reserve for other crucial tasks. Beside your CPUs and RAM may not be optimized for this tasks which may affect the efficiency. Our system contains a farm of servers which is highly optimized so we can perform this tasks faster and better.
  3. Avoid complicated interface: You may avoid unnecessarily complicated coding to control headless browser.
  4. Everything works smoothly: We will take care to make sure that your PDFs generated nicely,all fonts are working so that you can spend more time concentrate on your application rather than be bugged with Headless Chrome issues.

Our advantages over other similar PDF cloud services

We have studied well other services before we decided to move on with our services, here are some of our advantages over them:

  1. Some of them do not execute Javascript, only converting pure HTML to PDF but WE DO!
  2. Many of them require your application to be online so that resources can be loaded. If your application is in localhost or intranet their solution will not work but WE DO!

Get Token Key

Token key is a secret string with 64 characters used to access our service. You need to attach your token in every request you make to our service.

Steps to generate token key:

  1. If you have account with us, go to step 2 otherwise sign-up with us. An email with title "Welcome to ChromeHeadless.io" will be sent to you in few minutes after your sign up.
  2. Use account credential in welcome email to log in our system.
  3. Go to tokens management page
  4. Hit Generate button to generate token key.

Installation

The PHP Client can be installed through composer

Example

Exporting content

The export() method belongs the service class. It receives an array as parameter defining what you need to export. Below are list of properties:

Name Type Default Description
html string The html you want to convert
httpHost string "localhost" If set the httpHost and the baseUrl will be used to replace the resource link within html
baseUrl string The location which the html file should be in virtually
url string If html is not set and url is set instead then the url will used by php client
timeout number 30 Maximum navigation time in milliseconds, defaults to 30 seconds, pass 0 to disable timeout.
waitUntil string "load" When to consider navigation succeeded. Other options are "domcontentloaded" page finished when all DOM is loaded; "networkidle0" page finished when there are no more than 0 network connections for at least 500 ms; "networkidle2" page finished when there are no more than 2 network connections for at least 500 ms.

Export to PDF

The pdf() method will help to generate pdf file. It takes an array as parameter defining options for your PDF. Below are available options.

Name Type Default Description
scale number 1 Scale of the webpage rendering. Defaults to 1. Scale amount must be between 0.1 and 2
displayHeaderFooter bool false Display header and footer.
headerTemplate string HTML template for the print header. Should be valid HTML markup with following classes used to inject printing values into them: pageNumber current page number; totalPages total pages in the document;
footerTemplate string HTML template for the print footer. Should use the same format as the headerTemplate
printBackground bool false Print background graphics.
landscape bool false Paper orientation.
pageRanges string Paper ranges to print, e.g., '1-5, 8, 11-13'. Defaults to the empty string, which means print all pages.
format string Paper format. If set, takes priority over width or height options. Defaults to 'Letter'.
width string/number Paper width, accepts values labeled with units.
height string/number Paper height, accepts values labeled with units.
margin object Paper margins, defaults to none. It has 4 sub properties: top, right, bottom, left which can take number or string with units

Example:

PDF options in view file

Some options could be set directly in the PDF view file instead of pdf() method.

header and footer

In the view file, use header and footer tags to set pdf's header and footer template:

Example:

if either header or footer tag exists, pdf options' displayHeaderFooter will be true. PDF options' headerTemplate and footerTemplate options take priority over view file's header and footer tags. With header and footer tags, if there's no font-size style, a default style "font-size:10x" is used. Header and footer tags supports place holders like {date}, {title}, etc and img tag with link-type src. For img tag pdf options' headerTemplate and footerTemplate only support base64-type src.

margin

In the view file, use the body tag's margin style to set pdf margin:

Example:

If either header or footer tag exists but there's no body's margin, a default margin of 1 inch will be used

Export to PNG

The png() help to generate PNG file. It take an array as parameter defining options for your PNG. Below are list of properties:

Name Type Default Description
fullPage bool false When true, takes a screenshot of the full scrollable page.
clip object An object which specifies clipping region of the page. Should have the following fields: x is the x-coordinate of top-left corner of clip area, y is y-coordinate of top-left corner of clip area, width is the width of clipping area and height is the height of clipping area.
omitBackground bool false Hides default white background and allows capturing screenshots with transparency.
encoding string "binary" The encoding of the image, can be either base64 or binary

Example:

Export to JPG

The png() help to generate JPG file. It take an array as parameter defining options for your JPG. Below are list of properties:

Name Type Default Description
quality number The quality of the image, between 0-100.
fullPage bool false When true, takes a screenshot of the full scrollable page.
clip object An object which specifies clipping region of the page. Should have the following fields: x is the x-coordinate of top-left corner of clip area, y is y-coordinate of top-left corner of clip area, width is the width of clipping area and height is the height of clipping area.
omitBackground bool false Hides default white background and allows capturing screenshots with transparency.
encoding string "binary" The encoding of the image, can be either base64 or binary

Example:

Getting result

In all above examples we use method sendToBrowser() to send the file to browser for user to open on browser or download as attachment. Here are all options:

Method Return Description
sendToBrowser($filename, $inlineOrAttachment) Send file to client browser to open on browser or download as attachment. Default value is "attachment"
toString() string Return filename as string
toBase64() string Return content of file in base64
save($path) Save the file to specific location

Examples:

About us

KoolPHP Inc has been in business for 10 years, we focus on building the featured rich yet easy-to-use components to help developers increase productivity and deliver highest quality applications within time and budget constraints. Our main products are KoolPHP UI and KoolReport. KoolPHP UI is a toolset for developer to construct web faster while KoolReport is an open-source reporting framework to build data reports and dashboard easier.

All versions of php-client with dependencies

PHP Build Version
Package Version
Requires php Version >=5.4
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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