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How to call a PHP function inside a Heredoc.
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| <?php | |
| $cb = function ($fn) { | |
| return $fn; | |
| }; | |
| echo <<<HEREDOC | |
| Hello, {$cb(ucfirst('world'))} | |
| HEREDOC; |
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Also, there are a lot of options:
https://stackoverflow.com/questions/104516/calling-php-functions-within-heredoc-strings/36202673#36202673