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Strict warning: Only variables should be passed by reference in eval() [#2064265] | Drupal.org
Drupal 8 & SimpleSAMLPHP Library – TA Digital Labs
Drupal 8 core and Symfony components | ADCI Solutions
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Strict warning: Only variables should be passed by reference [#2892182] | Drupal.org
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Variables placed in email body not being replaced with actual value [#3056302] | Drupal.org
PHP: Only variables should be passed by reference - PHP Error - Mazz i Torch - The latest global technology multi-platform entertainment media
Drupal 9 Module Development - Third Edition | Packt
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Strict warning: Only variables should be passed by reference [#2892182] | Drupal.org
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Ajax Testing in Drupal 8 | Phase2 Technology
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Notice: Only variables should be passed by reference [#2936867] | Drupal.org
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PHP7: "Notice: Only variables should be passed by reference" - WPML
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Drupal 8 Services, Dependency Injection, and Decoupling Your Code | FFW
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Strict warning: Only variables should be passed by reference [#2892182] | Drupal.org
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Drupal 8 core and Symfony components | ADCI Solutions
Drupal 8 Theming Fundamentals, Part 2 | Lullabot
End to End Testing With Drupal and Cypress - Blog - Sevaa Group
