PHP Compatibility Index

Is WP Mail SMTP by WPForms compatible with PHP 8?

Version 4.10.3 · 4,000,000+ active installs · requires PHP 7.4

Works on PHP 8.0–8.5, with deprecation notices from 8.0

No removed PHP features found in WP Mail SMTP by WPForms 4.10.3. It uses 1 deprecated feature(s) that only log notices today.

PHP 8.0
⚠ 1
PHP 8.1
⚠ 1
PHP 8.2
⚠ 1
PHP 8.3
⚠ 1
PHP 8.4
⚠ 1
PHP 8.5
⚠ 1

✓ no problems · ⚠ deprecation notices only (still works) · ✗ uses something removed in that PHP version

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Deprecated (works today, logs notices)

File:lineWhat
vendor_prefixed/symfony/polyfill-intl-normalizer/Normalizer.php:134INI directive 'mbstring.func_overload' is deprecated since PHP 7.2 and removed since PHP 8.0

Removed long ago or protected by a check (code that most likely never runs on PHP 8)

File:lineWhat
vendor_prefixed/symfony/polyfill-intl-idn/bootstrap.php:133The constant "INTL_IDNA_VARIANT_2003" is deprecated since PHP 7.2 and removed since PHP 8.0
vendor_prefixed/symfony/polyfill-intl-idn/bootstrap.php:136The constant "INTL_IDNA_VARIANT_2003" is deprecated since PHP 7.2 and removed since PHP 8.0

Plugin page on WordPress.org: wp-mail-smtp