Руководство по PHP
Пред. | Приложение C. Migrating from PHP 3 to PHP 4 | След.

# PHP 3 extension

Extensions written for PHP 3 will not work with PHP 4, neither as binaries nor at the source level. It is not difficult to port extensions to PHP 4 if you have access to the original source. A detailed description of the actual porting process is not part of this text.

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Missing functions | Уровень выше | Variable substitution in strings