What are the potential issues with using common variables in PHP scripts for database queries and PDF generation?

Using common variables in PHP scripts for database queries and PDF generation can lead to conflicts or unintended data manipulation. To avoid this issue, it is recommended to use separate variables for each purpose to maintain data integrity. 

// Separate variables for database query and PDF generation
$databaseQueryVariable = "SELECT * FROM table_name WHERE column_name = 'value'";
$pdfGenerationVariable = "PDF content here";

Keywords

SQL injection PDF generation library variable scoping prepared statements data validation

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