What are the potential consequences of not closing string characters properly when using HTML within PHP code?

If string characters are not closed properly when using HTML within PHP code, it can lead to syntax errors or unexpected behavior in the output. To solve this issue, make sure to properly close the string characters when embedding HTML within PHP code by using the concatenation operator (.) to join the HTML content with the PHP string. 

// Incorrect way without closing string properly
echo "<h1>Hello World</h1>";

// Correct way to close string properly
echo "<h1>Hello World</h1>";

Keywords

PHP HTML syntax error string concatenation XSS vulnerability

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