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I need to read and understand some php code and I am new to this. I have the following code. I just need to know what is echo <<<ADDFORM is . I guess its a variable. But I could not find is anywhere in the page
The operator <<< means that everything between the matching labels (in you case ADDFORM) will be treated as a multi-line string. You can also now use quotes for multi-line strings in PHP, so this syntax is used less often.