How Can I Iterate Multiple Times Over a MySQL Result Set Using `mysql_*` Functions?

Looping Through MySQL Result Sets Multiple Times Using mysql_* Functions

How can you efficiently iterate over a MySQL result set more than once while utilizing the mysql_* functions? This scenario may arise when processing complex or multi-stage operations within a single script.

Solution:

To achieve this, employ the following steps:

$result = mysql_query(/* Your query */);
while ($row = mysql_fetch_assoc($result)) {
    // Perform necessary operations on the current row...
}

// Reset the result pointer to the beginning
mysql_data_seek($result, 0);
while ($row = mysql_fetch_assoc($result)) {
    // Re-process the current row...
}

This technique involves:

• Executing the query once and assigning the result to a variable.
• Using the mysql_fetch_assoc() function for initial row retrieval.
• Using mysql_data_seek() to reset the result pointer to the first row and iterating through the result set again.

Caution:

It's important to note that this approach may not be optimal for performance-intensive operations. Additionally, it may not be appropriate to re-process retrieved data within the same script, as the data should typically be manipulated in a single iteration.

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