How to print argument value to error log?

[John_Betong]

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I have the following file with the function fred(…) which I include for debugging purposes: fred.php <?php declare(strict_types=1); //=============================== // usage: // fred($val); // uses print_r(...) // fred($val, TRUE); // uses var_dump(...) //=============================== function fred($val='Nothing passed???', $vd=FALSE) { $style='width: 88%; margin: 1em auto; background-color: #ffd; color: #000'; echo '<pre style="' .$style .'">'; if( $vd ) : var_dump($val); else: pr…