Minor To reproduce:
<?php
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// Put this script into the $CFG->dirroot of your Moodle and visit it from the
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// browser.
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require(__DIR__.'/config.php');
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require_login();
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if (!empty($_REQUEST)) {
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header('Content-type: text/plain');
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var_dump($_REQUEST);
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die();
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}
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echo('<html><body>');
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echo('<form action="" method="post">');
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echo PHP_EOL;
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for ($i = 0; $i < 1100; $i++) {
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echo('<input type="hidden" name="foo[]" value="'.$i.'" />');
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echo PHP_EOL;
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}
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echo('<button type="submit">Submit</button>');
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echo('</body></html>');
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Assuming you have max_input_vars set to the default 1000, you should see that the $_REQUEST now contains invalid values and some vars are duplicated.
