The PHP native JSON extension has been bundled and compiled with PHP by default since version 5.2.0. Because the minimum version of PHP required by WordPress is now 5.6.20 (see #46594 and [45058]), JSON extension related polyfills and backwards compatibility code can now be removed.
This change removes the `json_last_error_msg()` and `JsonSerializable` polyfills included in WordPress for full JSON extension support in PHP < 5.6.
Follow up of [46205-46206].
See #47699.
Props jrf, Clorith, pento.
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As of PHP 5.3, the SPL extension cannot be disabled, so we no longer need this polyfill.
The file is kept with a `_deprecated_file()` call, to alert any plugins or themes that may be loading it directly.
Props jrf, ayeshrajans.
See #47698, #46630.
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Noteable changes:
- The `magic_quotes_runtime` and `magic_quotes_sybase` settings were removed in PHP 5.4, so no longer need to be set.
- Some functions that use external libraries can generate errors that can't be tested for, so are globally allowed to silence errors.
- Quite a few functions would cause errors if `safe_mode` was set. This setting was removed in PHP 5.4.
- Only a handful of `header()` calls needed corresponding `headers_sent()` checks for unit tests to pass, but more may need to be added as the nightlies builds are tested.
See #46732.
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This adds a pure PHP implementation of the cryptographic functions supported in PHP 7.2+. It provides the necessary backwards compatibility required to support signature verification and other security features going forward across all supported PHP versions.
Props paragoninitiativeenterprises
Fixes#45806. See #39309.
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The WPCS `WordPress.WhiteSpace.PrecisionAlignment` rule throws warnings for a bunch of code that will likely cause issues for `wpcbf`. Fixing these manually beforehand gives us better auto-fixed results later.
See #41057.
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The `__autoload()` function is deprecated in PHP 7.2, which means WordPress' own `__autoload()` compat function for PHP 5.2 needs to be moved into a separate file to prevent the PHP 7.2 compiler from complaining.
Props ayeshrajans
See #40109
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[37748] introduced `_wp_expand_nav_menu_post_data()` together with an `array_replace_recursive()` compatibility function for PHP 5.2.
Even though that compat function is tried and tested in other projects like BuddyPress, we need to add additional `isset()` checks in order to avoid 'Undefined index' notices in our case.
See #36590.
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[36510] allowed larger menus to be created in the Edit Menu screen by JSON-encoding the entire form into a single input field. However, it did not correctly handle nested arrays.
This introduces a new `_wp_expand_nav_menu_post_data()` helper function to handle this POST data which uses `array_replace_recursive()` internally. Since the latter is only available on PHP 5.3+, we add a compatibility function to ensure PHP 5.2 support.
Props ericlewis, neverything, swissspidy.
Fixes#36590 for trunk. See #14134.
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`random_compat` offers a set of compatible functions for older versions of PHP, filling in the gap by using other PHP extensions when available.
We still include our existing `wp_rand()` functionality as a fallback for when no proper CSPRNG exists on the system.
Take Two, this was previously committed in [34922] but had an issue on PHP 5.2 which sarciszewski has now resolved.
Props sarciszewski
See #28633
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`random_compat` offers a set of compatible functions for older versions of PHP, filling in the gap by using other PHP extensions when available.
We still include our existing `wp_rand()` functionality as a fallback for when no proper CSPRNG exists on the system.
Props sarciszewski
See #28633
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In PHP 5.3.0, `is_a()` is no longer deprecated, and will therefore no longer throw `E_STRICT` warnings.
To avoid warnings in PHP < 5.3.0, convert all `is_a()` calls to `$var instanceof WP_Class` calls.
`instanceof` does not throw any error if the variable being tested is not an object, it simply returns `false`.
Props markoheijnen, wonderboymusic.
Fixes#25672.
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