What is the issue with the multi-line echo in the provided PHP code?

The issue with the multi-line echo in the provided PHP code is that it is using single quotes which do not support multi-line strings. To fix this issue, you can use double quotes around the string instead, which allows for multi-line strings in PHP. 

// Incorrect code with single quotes
echo 'This is 
a multi-line 
string';

// Corrected code with double quotes
echo "This is 
a multi-line 
string";

Keywords

multi-line echo PHP code syntax error string concatenation heredoc syntax

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