README

Yii Strings

The package provides:

• StringHelper that has static methods to work with strings;
• NumericHelper that has static methods to work with numeric strings;
• Inflector provides methods such as toPlural() or toSlug() that derive a new string based on the string given;
• WildcardPattern is a shell wildcard pattern to match strings against.

Installation

composer require yiisoft/strings

StringHelper usage

String helper methods are static so usage is like the following:

echo \Yiisoft\Strings\StringHelper::countWords('Strings are cool!'); // 3

Overall the helper has the following method groups.

Bytes

• byteLength
• byteSubstring

File paths

• baseName
• directoryName

Substrings

• substring
• replaceSubstring
• startsWith
• startsWithIgnoringCase
• endsWith
• endsWithIgnoringCase

Truncation

• truncateBegin
• truncateMiddle
• truncateEnd
• truncateWords

Counting

• length
• countWords

Lowercase and uppercase

• lowercase
• uppercase
• uppercaseFirstCharacter
• uppercaseFirstCharacterInEachWord

URL friendly base64

• base64UrlEncode
• base64UrlDecode

Other

• split

NumericHelper usage

Numeric helper methods are static so usage is like the following:

echo \Yiisoft\Strings\NumericHelper::toOrdinal(3); // 3rd

The following methods are available:

• toOrdinal
• normalize
• isInteger

Inflector usage

echo (new \Yiisoft\Strings\Inflector())->withoutIntl()->toSlug('Strings are cool!'); // strings-are-cool

Overall the inflector has the following method groups.

Plurals and singulars

• toPlural
• toSingular

Transliteration

• toTransliterated

Case conversion

• pascalCaseToId
• toPascalCase
• toCamelCase

Words and sentences

• toSentence
• toWords
• toHumanReadable

Classes and database tables

• classToTable
• tableToClass

URLs

• toSlug

WildcardPattern usage

WildcardPattern allows a simple POSIX-style string matching.

use \Yiisoft\Strings\WildcardPattern;

$startsWithTest = new WildcardPattern('test*');
if ($startsWithTest->match('testIfThisIsTrue')) {
    echo 'It starts with "test"!';
}

The following characters are special in the pattern:

• \ escapes other special characters if usage of escape character is not turned off.
• * matches any string, including the empty string.
• ? matches any single character.
• [seq] matches any character in seq.
• [a-z] matches any character from a to z.
• [!seq] matches any character not in seq.
• [[:alnum:]] matches POSIX style character classes.

Several options are available. Call these before doing a match():

• withoutEscape() - makes \ a regular character in a pattern.
• withExactSlashes() - makes \ in a string to match \ only in a pattern.
• ignoreCase() - case-insensitive match.
• withExactLeadingPeriod() - makes first . in a string match only . in a pattern.
• withEnding() - match ending of testing string.

When matching file paths, it is advised to use both withExactSlashes() and withExactLeadingPeriod():

use \Yiisoft\Strings\WildcardPattern;

$startsWithTest = (new WildcardPattern('config/*.php'))
    ->withExactLeadingPeriod()
    ->withExactSlashes();

if ($startsWithTest->match($fileName)) {
    echo 'It is a config!';
}

Unit testing

The package is tested with PHPUnit. To run tests:

./vendor/bin/phpunit

Mutation testing

The package tests are checked with Infection mutation framework. To run it:

./vendor/bin/infection

Static analysis

The code is statically analyzed with Psalm. To run static analysis:

./vendor/bin/psalm

Support the project

Follow updates

License

The Yii Strings is free software. It is released under the terms of the BSD License. Please see LICENSE for more information.

Maintained by Yii Software.