The `localeconv()` function in PHP returns an associative array containing local numeric and monetary formatting information based on the current locale settings.PHP 8.PHP 8.1,PHP 8.2,PHP 8.3,and PHP 8.4.

Basic Usage<?php// Set the locale (this example uses US English)setlocale(LC_ALL, 'en_US.UTF-8');// Get locale conventions$locale_info = localeconv();// Display the informationprint_r($locale_info);<?

Example with Common Values

Here's a more practical example showing how to use specific values from `localeconv()`:<?php// Set locale to German (Germany)setlocale(LC_ALL, 'de_DE.UTF-8');$locale_info = localeconv();echo "Numeric Formatting for German (Germany):\n";echo "Decimal Point: " . $locale_info['decimal_point'] . "\n";echo "Thousands Separator: " . $locale_info['thousands_sep'] . "\n";echo "Grouping: " . implode(', ', $locale_info['grouping']) . "\n";echo "\nMonetary Formatting:\n";echo "Currency Symbol: " . $locale_info['currency_symbol'] . "\n";echo "Monetary Decimal Point: " . $locale_info['mon_decimal_point'] . "\n";echo "Positive Sign: " . $locale_info['positive_sign'] . "\n";echo "Negative Sign: " . $locale_info['negative_sign'] . "\n";?>

Important Notes for PHP 8.21. Locale Availability**: The locales you try to use must be installed on your system. You can check available locales with `locale -a` on Linux/macOS.2. UTF-8 Recommended**: Always use UTF-8 locales (e.g., 'en_US.UTF-8') for best compatibility.4. **Array Structure**: The returned array contains both numeric and monetary formatting information. Here are some key elements:`decimal_point` - Decimal point character`thousands_sep` - Thousands separator`grouping` - Array showing how digits are grouped`currency_symbol` - Local currency symbol`int_curr_symbol` - International currency symbolRemember that the actual output depends on your system's locale settings and installed locales.