How format number value in php?
You should use str_pad : https://www.php.net/manual/en/function.str-pad.php
$formattedValue = str_pad($value, 6, "0", STR_PAD_LEFT);
sprintf:
$formattedValue = sprintf('%05s', $value);
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0is the character to pad5times.sspecifies that it's a string.