Php string code error
Briefly

The PHP warning regarding 'Unexpected character in input' signifies a syntax error at a specified line in your script. This often arises from non-ASCII characters, misplaced symbols, or issues during code pasting. While this warning is informative, it typically precedes an actual error that could be fatal. To rectify the problem, closely examine the code at the line indicated in the warning and look for hidden characters, incorrect string syntax, or formatting issues like trailing whitespaces. These steps will help identify and resolve the underlying problem efficiently.
The PHP warning regarding "Unexpected character in input" indicates there's likely a syntax error in the script, often due to misplaced characters or encoding issues.
To effectively diagnose this warning, refer to the specific line indicated by the warning message as it provides context to the underlying problem.
This warning suggests that a character PHP does not recognize may have been inadvertently included, commonly from copying and pasting code from different sources.
To resolve PHP issues, checking for trailing whitespace, non-ASCII characters, or unexpected symbols in the code can be critical in rectifying the syntax error.
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