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PHP: Migrating from PHP 5.5.x to PHP 5.6.x - Manual
PHP 7.1.0 Release Candidate 1 Released
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    Migrating from PHP 5.5.x to PHP 5.6.x

    Table of Contents

    • Backward incompatible changes
    • New features
    • Deprecated features in PHP 5.6.x
    • Changed functions
    • New functions
    • OpenSSL changes in PHP 5.6.x
    • Other changes to extensions
    • New global constants

    Most improvements in PHP 5.6.x have no impact on existing code. There are a few incompatibilities and new features that should be considered, and code should be tested before switching PHP versions in production environments.

    See also the migration guides for PHP versions 5.0.x, 5.1.x, 5.2.x, 5.3.x, 5.4.x and 5.5.x.

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    wmy_bang at 126 dot com
    10 hours ago
    not now, I just want to upgrade PHP
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