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.

Requirements

• PHP 7.4 or higher.

Installation

composer require yiisoft/strings --prefer-dist

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, except delimiters (/ and \ by default).
• ** matches any string, including the empty string and delimiters.
• ? 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.

ignoreCase() could be called before doing a match() to get a case-insensitive match:

use \Yiisoft\Strings\WildcardPattern;

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

Testing

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

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.

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