StringFormatter

StringFormatter - simple but powerful string formatting.

Current stable version

0.6.0

PHP version

StringFormatter works with PHP 5.3+, 5.4+, 5.5+, 5.6+, 7.0+, 7.1+

Usage

StringFormatter is composed with few classes, where manually You will use just two of them. Both require format being used to compile final string, and some params (optional) to fill placeholders in format. Placeholder is surrounded by braces, and contain index (FormatterIndex class) or name (FormatterNamed class), and optional modifiers.

Simplest usage can be like:

$f = new FormatterIndex('{0} {1}!');
echo $f->compile('Hello', 'world')->eol(); # Hello world!

There we are using FormatterIndex class, so we will use indexed placeholders. There are defined two placeholders: 0 and 1. In some cases, we can omit indexes:

$f = new FormatterIndex('{} {}!');
echo $f->compile('Hello', 'world')->eol(); # Hello world!

Result of this two pieces of code is exactly the same.

Of course, we can change order of used arguments:

$f = new FormatterIndex('{1} {0}!');
echo $f->compile('Hello', 'world')->eol(); # world Hello!

Parameters for placeholders we can also pass in constructor:

$f = new FormatterIndex('{} {}!', 'Hello', 'world');
echo $f->compile()->eol(); # Hello world!

There is also FormatterNamed class, when we don't want to use indexes for selecting objects for placeholders:

$f = new FormatterNamed('{hello} {name}!');
echo $f->compile(['name' => 'world', 'hello' => 'Hello']); # Hello world!

Here, similar to FormatterIndex class, we can also pass arguments in constructor. Also by default both arrays are merged into one, and used for placeholders:

$f = new FormatterNamed('{hello}, {name}!', ['hello' => 'Hi']);
echo $f->compile(['name' => 'Thomas'])->eol(); # Hi, Thomas!
echo $f->compile(['name' => 'Martha'])->eol(); # Hi, Martha!
echo $f->compile(['hello' => 'Welcome', 'name' => 'Bruce'])->eol(); # Welcome, Bruce!

As a result of IFormatter::compile method we got an instance of Transformer class, that have some additional possibilities (described below).

Internals

Whole package is focused on two things:

• create string using template (`format`) and replace placeholders with data (`params`). This process is called `compiling`.
• manipulate final string after compilation (`transforming`)

Compilation

Compilation is done by calling method Compiler::run. Usually it's done by you under the hood, when you call IFormat::compile or iformat, iformatl or nformat. This process is done usually when you will evaluate Tranformer first time (lazy evaluated), and then cached, so will not be processed anymore.

Transformation

Transformer is an object you are receiving after calling IFormatter::compile (iformat, iformatl or nformat functions call it under the hood). Transformer allows you to manipulate final string, created after compilation.

Transformer result is non-mutable. It means that you can store result of one transformation, add new one, and this will not modify previous one:

 $adj = 'glorious';
 $char = '!';
 $normal = iformat('Some {} method{}', [$adj, $char]);
 $lower = $normal->lower()->eol();
 $surrounded = $normal->surround('@@@')->eol();
 echo $normal->eol(); # Some glorious method!
 echo $lower; # some glorious method!
 echo $surrounded; # @@@Some glorious method!@@@

Look on $surrounded: it's not lower-cased like in $lower.

Transformers are lazy evaluated on first call to Transformer::unfold method (explicit or implicit by casting it to string). Also result of evaluation is cached, so next use of same Transformer is cheap.

Shortcuts

Pst, there is more ;)

Both classes have also functional API. Instead of manually creating object, call a method etc, You can use functions:

$adj = 'glorious';
$char = '!';
echo iformat('Some {} method{}', [$adj, $char])->eol(); 
echo iformatl('Some {} method{}', $adj, $char)->eol(); 
echo nformat('Some {adj} method{char}', ['adj' => $adj, 'char' => $char])->eol(); 

iformat and iformatl differs only with parameters format (array or list).

For PHP 5.6.0 or newer, you can import just this functions:

use function m36\StringFormatter\iformat;
use function m36\StringFormatter\iformatl;
use function m36\StringFormatter\nformat;

And use them as well :)

Formatters

Text alignment - left:

$f = new FormatterIndex('{} "{1:<20}"');
echo $f->compile('Hello', 'world')->eol(); # Hello "world               "

Text alignment - right:

$f = new FormatterIndex('{} "{1:>20}"');
echo $f->compile('Hello', 'world')->eol(); # Hello "               world"

Text alignment - center:

$f = new FormatterIndex('{} "{1:^20}"');
echo $f->compile('Hello', 'world')->eol(); # Hello "       world        "

Text alignment with specified character:

$f = new FormatterIndex('{} "{1:*^20}"');
echo $f->compile('Hello', 'world')->eol(); # Hello "*world"

Sprintf-like formatting (handle all specifiers sprintf() do):

$f = new FormatterIndex('Test: {%%.3f}');
echo $f->compile(2.1234567)->eol(); # Test: 2.123
$f = new FormatterIndex('Test 2: {%%c}');
echo $f->compile(97)->eol(); # Test2: a

Call object method or get object property:

$f = new FormatterIndex('Test: {0->method} {->property}');
class TestStringFormatter {
    public $property = 'test property';
    public function method() {
        return 'test method';
    }
}
echo $f->compile(new TestStringFormatter(), new TestStringFormatter())->eol(); # Test: test method test property

Convert int to other base:

$f = new FormatterIndex('Test: 10: {#d}, 16: {0#x}, 2: {0#b}');
echo $f->compile(11)->eol(); # Test: 10: 11, 16: b, 2: 1011
$f = new FormatterIndex('Test: 10: {#10}, 16: {0#16}, 2: {0#2}, 7: {0#7}');
echo $f->compile(11)->eol(); # Test: 10: 11, 16: b, 2: 1011, 7: 14

Available bases: * b - binary * o - octal * d - decimal * x - hex (small letters) * X - hex (big letters)

Array indexes:

$f = new FormatterIndex('Test: test1: {[test1]}, test2: {0[test2]}');
echo $f->compile(array('test1' => 'Hello', 'test2' => 'world'))->eol(); # Test: test1: Hello, test2: world

Keywords

As a placeholder, you can use one of followed keywords (modifiers are not accepted there):

* @class - replaced by current class name (without namespace). Will trigger E_USER_WARNING if used outside of class. * @classLong - replaced by current class name (with namespace). Will trigger E_USER_WARNING if used outside of class. * @method - replaced by current class name (without namespace) and method

name. Will trigger E_USER_WARNING if used outside of class.

* @methodLong - replaced by current class name (with namespace) and method

name. Will trigger E_USER_WARNING if used outside of class.

* @function - replaced by current function/method name (without namespace and class name). Will trigger E_USER_WARNING if used outside of function. * @file - file name where IFormatter::compile is called (without parents) * @fileLong - full path to file where IFormatter::compile is called (with parents) * @dir - directory name of file where IFormatter::compile is called (without parents) * @dirLong - directory name of file where IFormatter::compile is called (with parents) * @line - line number in file where IFormatter::compile is called (without parents)

List of transformers

As a return of IFormatter::compile we got and instance of Transformer class. There are defined some simple and useful transformers for parsed string:

* replace - wrapper for str_replace * ireplace - wrapper for ireplace * regexReplace - wrapper for preg_replace or preg_replace_callback (depends on $replacement being .callback or not) * strip - wrapper for trim * lstrip - wrapper for ltrim * rstrip - wrapper for rtrim * upper - wrapper for strtoupper * lower - wrapper for strtolower * upperFirst - wrapper for ucfirst * lowerFirst - wrapper for lcfirst * upperWords - wrapper for ucwords * wordWrap - wrapper for wordwrap * substr - wrapper for substr * eol - append PHP_EOL at the end of string * eoln - append \n at the end of string * eolrn - append \r\n at the end of string * suffix - append given string to the end of current value * prefix - prepend given string to the beginning of current value * surround - surround current value with given string

Some examples

// assume it's result of $request->query->all() from Symfony
$data = ['customerId' => 2, 'customerName' => 'John', 'customerLastName' => 'Wayne', 'age' => 24];
echo nformat('[{@file}:{@line}] Incoming data for customerId #{customerId}: first name: {customerName}, ' .
    'last name: {customerLastName}, age: {age}', $data)->eol();
# [example.php:12] Incoming data for customerId #2: first name: John, last name: Wayne, age: 24

// fetch data about package from Doctrine
$package = $this->em->find(Package::class, $request->get('packageId'));
$logger->info(nformat('[{@method}] Package id {packageId} found with data: {package->getName}, {package->getTechnology} created at {package->getCreateDate}', ['packageId' => $request->get('packageId'), 'package' => $package]));
# [Example::test] Package id 4 found with data: m36/StringFormatter, php created at 2016-05-19 12:02:16

$f = new FormatterNamed('{hello}, {name}!', ['hello' => 'Hi']);
$data = $f->compile(['name' => 'Thomas']);
echo $data->eol(); # Hi, Thomas!
echo $data->upper()->eol(); # HI, THOMAS!
echo $data->lower()->eol(); # hi, thomas!
echo $data->replace('!', '?')->eol(); # Hi, Thomas?
echo $data->replace(['!', ','], ['?', '@'])->eol(); # Hi@ Thomas?

Installation

Use composer:

composer require m36/stringformatter 

Voila!

Authors

Marcin Sztolcman <m.sztolcman@36monkeys.com>

Contact

If you like or dislike this software, please do not hesitate to tell me about this me via email (m.sztolcman@36monkeys.com).

If you find bug or have an idea to enhance this tool, please use GitHub's issues.

License

The MIT License (MIT)

Copyright (c) 2016 Marcin Sztolcman

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

ChangeLog

(dev)

• `Compiler` can return informations about evaluated parameters
• `m36\StringFormatter` is now lazy evaluated
• added new transformer: `surround`
• for transformers `Transformer::replace` and `Transformer::ireplace` second parameter (`$to`) can be a callable (like for `Transformer::regexpReplace`)
• trigger E_USER_WARNING if token is unknown
• many improvements for older PHP versions
• added new tests
• improved code documentation
• internal optimizations and cleanups

v0.6.0

• many transformers uses Multibyte String module if available
• added new transformers: `Transformer::regexReplace`, `Transformer::repeat`, `Transformer::reverse`, `Transformer::squashWhitechars`, `Transformer::insert`, `Transformer::ensurePrefix`, `Transformer::ensureSuffix`

v0.5.4

• missing changelog

v0.5.3

• fixed handling some keywords usages outside a class or function

v0.5.2

• fixed composer.json version

v0.5.1

• using @keywords in functional API was broken for some keywords

v0.5.0

• First public version