To insert characters that are illegal in a string, use an escape character.
An escape character is a backslash \ followed by the character you want to insert.
\
An example of an illegal character is a double quote inside a string that is surrounded by double quotes:
$x = "We are the so-called "Vikings" from the north.";
To fix this problem, use the escape character \":
\"
$x = "We are the so-called \"Vikings\" from the north.";
Other escape characters used in PHP:
protecting children
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