It occurs when scripts exceed the server’s allocated RAM. While the error mentions memory, large file uploads can trigger it by consuming extra resources during processing — that’s why increasing maximum upload size often helps alongside memory fixes.
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Current WordPress PHP Recommendation (as of February 2026)
WordPress VersionMinimum PHPRecommended / Strongly PreferredSecurity Supported UntilWordPress 6.4 – 6.77.4PHP 8.2 or PHP 8.3PHP 8.1 → Dec 2025
PHP 8.2 → Dec 2026
PHP 8.3 → Nov 2027