Libraries tagged by polyfill

Polyfill for mb_ereg(), mb_eregi(), mb_ereg_match(), and mb_ereg_replace*() functions; primary use case is for mbstring on Windows 7.4+

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PHP 7.0 version of Symfony polyfill backporting some PHP 8.0+ features to lower PHP versions

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PHP Polyfill for the Calendar extension

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Polyfill for the New Relic PHP extension

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PHP 8.4 bcmath functions polyfill with fallback compatibility for environments without bcmath extension. Based on phpseclib/bcmath_compat with additional support for new PHP 8.4 bcmath functions.

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A php implementation of string functions introduced in php8 and above

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A trivial but working polyfill for PHP 7.3 is_countable function. Supports PHP versions >= 5.3

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Use Laravel's pre-5.8 env() function in your non-Laravel projects.

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A php implementation of the levenshtein distance without length limitation

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Polyfills for URL-related functions introduced in BuddyPress 12.0.

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Provide methods for serialization and use igbinary if is available.

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A polyfill for PHP's money_format() function, intended for Windows. Source from Rafael M. Salvioni (in the comments for money_format()).

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Tiny script to create APC aliases when APCu is present but APC support is not emulated.

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Remove unnecessary PHP polyfills

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