从 PHP 5.3.X 迁移到 PHP 5.4.X
PHP Manual

新的全局常量

PHP 核心:

Curl:

LibXML:

OpenSSL:

输出缓冲:

Sessions:

Streams:

Zlib:

Intl:

Json:

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从 PHP 5.3.X 迁移到 PHP 5.4.X
PHP Manual