What does the error "Warning: syntax error, unexpected TC_LABEL, expecting '=' in lang.ini" indicate in PHP?

The error "Warning: syntax error, unexpected TC_LABEL, expecting '=' in lang.ini" indicates that there is a syntax error in the lang.ini file where a label is being used incorrectly. To solve this issue, you need to check the lang.ini file for any syntax errors, specifically looking for a label that is not followed by an equal sign.

// Example of lang.ini file with incorrect label syntax causing the error
// lang.ini
ERROR_LABEL: Error message

// Corrected lang.ini file with labels followed by equal sign
// lang.ini
ERROR_LABEL = Error message