html - PHP: Trouble composing strings -

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i'm using php code

echo " onclick='myfunction(" . $row['username'] . ")'"

that give me result

onclick="myfunction(francis88)"

but want this:

onclick="myfunction('francis88')"

how should change php code obtain this?

use \ escape character within string, example:

echo " onclick=\"myfunction('" . $row['username'] . "')\""

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