How can the locale settings impact the output of currency formatting functions in PHP?

Locale settings can impact the output of currency formatting functions in PHP because they determine how numbers, dates, and currencies are displayed based on the user's location and language preferences. To ensure that currency formatting functions display the correct currency symbol and format, you should set the desired locale using the setlocale() function before calling any currency formatting functions. 

// Set the locale to use for currency formatting
setlocale(LC_MONETARY, 'en_US');

// Format a currency amount using the set locale
$amount = 1000;
echo money_format('%i', $amount);

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locale settings currency formatting PHP output impact

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