How can PHP functions like var_dump() and mysql_num_rows() be utilized to troubleshoot code errors?

When troubleshooting code errors in PHP, functions like var_dump() can be used to display the contents of variables and objects, helping to identify the source of issues. Similarly, functions like mysql_num_rows() can be used to check the number of rows returned by a MySQL query, which can help pinpoint database-related errors. 

// Example of using var_dump() to troubleshoot code errors
$variable = "Hello World";
var_dump($variable);

// Example of using mysql_num_rows() to check the number of rows returned by a MySQL query
$result = mysqli_query($connection, "SELECT * FROM table");
$num_rows = mysqli_num_rows($result);
echo "Number of rows: " . $num_rows;

Keywords

var_dump mysql_num_rows troubleshoot code errors PHP functions

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