ignore_user_abort() function in PHP

The ignore_user_abort() function sets whether a remote client can abort the running of a script. When enabled, the script continues executing even if the user closes their browser or navigates away from the page.

Syntax

ignore_user_abort(setting)

Parameters

• setting − Optional boolean parameter. TRUE ignores user aborts (script continues running), FALSE allows user aborts to stop the script (default behavior).

Return Value

The ignore_user_abort() function returns the previous value of the user-abort setting as an integer (0 for false, 1 for true).

Example 1: Getting Current Setting

The following example gets the current ignore_user_abort setting ?

<?php
    $current_setting = ignore_user_abort();
    echo "Current ignore_user_abort setting: " . $current_setting;
?>

Current ignore_user_abort setting: 0

Example 2: Enabling User Abort Ignore

This example enables ignore_user_abort and shows the previous setting ?

<?php
    $previous_setting = ignore_user_abort(true);
    echo "Previous setting: " . $previous_setting . "<br>";
    echo "Current setting: " . ignore_user_abort();
?>

Previous setting: 0
Current setting: 1

Practical Use Case

This function is commonly used for long-running processes that should complete even if the user disconnects ?

<?php
    // Enable ignore user abort for critical file processing
    ignore_user_abort(true);
    
    // Process large file that might take several minutes
    $large_file = file_get_contents('huge_data.txt');
    
    // Process and save results - continues even if user leaves page
    $processed_data = process_data($large_file);
    file_put_contents('results.txt', $processed_data);
    
    // Restore original setting
    ignore_user_abort(false);
?>

Conclusion

The ignore_user_abort() function is useful for ensuring critical scripts complete execution even when users disconnect. Always restore the original setting after completing long-running operations.