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Programming PHP, 3rd Edition by Peter MacIntyre, Kevin Tatroe, Rasmus Lerdorf

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Appendix A. Function Reference

This appendix describes the functions available in the built-in PHP extensions. These are the extensions that PHP is built with if you give no --with or --enable options to configure, and cannot be removed via configuration options.

For each function, we’ve provided the function signature, showing the data types of the various arguments and which are mandatory or optional, as well as a brief description of the side effects, errors, and returned data structures.

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