handlebars.php
Ultra fast PHP7 implementation of handlebars.js, (*1)
, (*2)
Install
$ composer install cradlephp/handlebars
, (*3)
Introduction
PHP Handlebars and JS interface to match with compile time helper support and super nice compile
time error reporting. This version of Handlebars is based on caching the compiled templates and
inherently made the overall compile times faster. Loading at ~50ms uncached and ~30ms cached., (*4)
, (*5)
Basic Usage
Rendering
use Cradle\Handlebars\HandlebarsHandler as Handlebars;
$handlebars = new Handlebars();
$template = $handlebars->compile('{{foo}} {{bar}}');
echo $template(['foo' => 'BAR', 'bar' => 'ZOO']);
Registering Helpers
$handlebars->registerHelper('bar', function($options) {
return 'ZOO';
});
$template = $handlebars->compile('{{foo}} {{bar}}');
echo $template(['foo' => 'BAR']);
Registering Partials
$handlebars->registerPartial('bar', 'zoo');
$template = $handlebars->compile('{{foo}} {{> bar}}');
echo $template(['foo' => 'BAR']);
, (*6)
Features
- PHP API - designed to match the handlebars.js documentation
- registerHelper() - Matches exactly what you expect from handlebars.js (except it's PHP syntax)
- registerPartial() - accepts strings and functions as callbacks
- Literals like
{{./foo}} and {{../bar}} are evaluated properly
- Comments like
{{!-- Something --}} and {{! Something }} supported
- Trims like
{{~#each}} and {{~foo~}} supported
- Mustache backwards compatibility
{{#foo}}{{this}}{{/foo}}
- Tokenizer helpers to optimize custom code generation to cache
- Event handlers for unknown helpers and unknown partials
- Default Helpers matching handlebars.js
- each - and
{{#each foo as |value, key|}}
- Please note that there is an issue with
each being slow depending on the size of the object
- We need help optimizing this
- with
- unless
- if
, (*7)
De-Features (or whatever the opposite of features is)
- Does not support file templates.
- You need to load them up and pass it into Handlebars.
- If this is a problem you should consider other Handlebars PHP libraries
- You can always create a helper for this
- This de-feature will be considered upon requests ( create an issue :) )
- Partial Failover
- Something we haven't had a chance to come around doing yet as we did not have a need
- This de-feature will be considered upon requests ( create an issue :) )
- Safe String/Escaping
- PHP has functions that can turn a string "safe".
- We didn't want to create something that already exists in other contexts
- This de-feature will be considered upon requests ( create an issue :) )
- Utils
- PHP has functions that support most of the listed Utils in handlebars.js
- We didn't want to create something that already exists in other contexts
- This de-feature will be considered upon requests ( create an issue :) )
- Dynamic Partials
- At the bottom of our pipe
- because of it's difficulty to recreate
- and practicality
- This de-feature will be considered upon requests ( create an issue :( )
- Inline Partials
- Decorators
- Frames
, (*8)
Production Ready
When your templates are ready for a production (live) environment, it is recommended that caching be used. To enable cache:, (*9)
- Create a cache folder and make sure permissions are properly set for handlebars to write files to it.
- Enable cache by using
$handlebars->setCache(__DIR__.'/your/cache/folder/location');
- If the folder location does not exist, caching will be disabled.
, (*10)
API
, (*11)
compile
Returns a callback that binds the data with the template, (*12)
Usage
$handlebars->compile(string $string);
Parameters
-
string $string - the template string
Returns function - the template binding handler, (*13)
Example
$handlebars->compile();
, (*14)
getCache
Returns the active cache path, (*15)
Usage
$handlebars->getCache();
Returns Closure, (*16)
, (*17)
getHelper
Returns a helper given the name, (*18)
Usage
$handlebars->getHelper('if');
Parameters
-
string $name - the name of the helper
Returns Closure, (*19)
, (*20)
getHelpers
Returns all the registered helpers, (*21)
Usage
$handlebars->getHelpers();
Parameters
Returns array, (*22)
, (*23)
getPartial
Returns a partial given the name, (*24)
Usage
$handlebars->getPartial('foobar');
Parameters
-
string $name - the name of the partial
Returns string, (*25)
, (*26)
getPartials
Returns all the registered partials, (*27)
Usage
$handlebars->getPartials();
Parameters
Returns array, (*28)
, (*29)
registerHelper
The famous register helper matching the Handlebars API, (*30)
Usage
$handlebars->registerHelper(string $name, function $helper);
Parameters
-
string $name - the name of the helper
-
function $helper - the helper handler
Returns Eden\Handlebrs\Index, (*31)
Example
$handlebars->registerHelper();
, (*32)
registerPartial
Delays registering partials to the engine because there is no add partial method..., (*33)
Usage
$handlebars->registerPartial(string $name, string $partial);
Parameters
-
string $name - the name of the helper
-
string $partial - the helper handler
Returns Eden\Handlebrs\Index, (*34)
Example
$handlebars->registerPartial();
, (*35)
setCache
Enables the cache option, (*36)
Usage
$handlebars->setCache(string $path);
Parameters
-
string $path - The cache path
Returns Eden\Handlebrs\Index, (*37)
Example
$handlebars->setCache('/path/to/cache/folder');
, (*38)
setPrefix
Sets the file name prefix for caching, (*39)
Usage
$handlebars->setPrefix(string $prefix);
Parameters
-
string $prefix - Custom prefix name
Returns Eden\Handlebrs\Index, (*40)
Example
$handlebars->setPrefix('special-template-');
, (*41)
unregisterHelper
The opposite of registerHelper, (*42)
Usage
$handlebars->unregisterHelper(string $name);
Parameters
-
string $name - the helper name
Returns Eden\Handlebars\Index, (*43)
Example
$handlebars->unregisterHelper();
, (*44)
unregisterPartial
The opposite of registerPartial, (*45)
Usage
$handlebars->unregisterPartial(string $name);
Parameters
-
string $name - the partial name
Returns Eden\Handlebars\Index, (*46)
Example
$handlebars->unregisterPartial();
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