Libraries tagged by expressions

Simple DOM wrapper to select nodes using either CSS or XPath expressions and manipulate results quickly and easily.

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PHP parser for mathematical expressions, including elementary functions, variables and implicit multiplication. Also supports symbolic differentiation.

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Implementation of the Specification pattern and logical expressions for PHP.

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PHP Regular expressions made easy

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Converts cron expressions into human readable descriptions.

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PHP regular expression brought up to modern standards.

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Parsing and evaluating mathematical formulas given as strings.

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StringCalc is a PHP calculator library for mathematical terms (expressions) passed as strings.

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Lexical analyzer with individual token definition with regular expressions

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Library that generates regular expressions that match a list of strings.

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Standard (V7) compliant crontab expression parser/validator with support for time zones

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The Embedded Expression Language (Eel) is a building block for creating Domain Specific Languages

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A simple language written in PHP that evaluates expressions without eval

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✖️➕➖➗ `math_eval` safely evaluates mathematical expressions

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Validates popular debit and credit cards numbers against regular expressions and Luhn algorithm. Also validates the CVC and the expiration date

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