PHP Pass by Reference | PHP Pass by Reference with Examples
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PHP Fatal error: Only variables can be passed by reference in program/steps/mail/sendmail.inc on line 354 · Issue #1372 · roundcube/roundcubemail · GitHub
PHP Fatal error: Only variables can be passed by reference in .../typo3conf/ext/div2007/class.tx_div2007_alpha5.php on line 2744 · Issue #5 · franzholz/div2007 · GitHub
The PHP Handbook – Learn PHP for Beginners
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PHP: Only variables should be passed by reference - PHP Error - Mazz i Torch - The latest global technology multi-platform entertainment media
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PHP Fatal error: Only variables can be passed by reference on line 18 · Issue #7 · librespeed/speedtest · GitHub
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PHP: Only variables should be passed by reference - PHP Error - Mazz i Torch - The latest global technology multi-platform entertainment media
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