How to get digital format information in PHP

php editor Xinyi will introduce you in detail how to obtain the format information of numbers in PHP. Whether it is currency, percentage, number of decimal points, etc., PHP provides a wealth of functions and methods to handle number formats. Through the guidance of this article, you will learn how to use PHP built-in functions and custom functions to format numbers, making your number display clearer and easier to read. Let’s explore together!

PHP Get digital format information

php Provides a variety of functions to obtain digital format information, including:

1. number_format()

Format a number with the specified thousands separator, decimal point, precision, and currency sign.

grammar:

number_fORMat(float $number, int $decimals, string $dec_point, string $thousands_sep)

parameter:

• $number：The number to be formatted
• $decimals：Number of digits after the decimal point
• $dec_point：Decimal point character
• $thousands_sep：Thousands separator

Example:

$number = 1234567.89;
$formatted_number = number_format($number, 2, ".", ","); // 1,234,567.89

2. localeconv()

Get number format information about the current locale.

grammar:

localeconv()

return:

An associative array containing the following number format information:

• decimal_point：Decimal point character
• thousands_sep：Thousands separator
• grouping: Array of numeric grouping size
• mon_decimal_point：Currency decimal point character
• mon_thousands_sep：Currency thousands separator
• mon_grouping：Array of currency number grouping size

Example:

$locale_info = localeconv();
echo $locale_info["decimal_point"]; // .
echo $locale_info["thousands_sep"]; // ,

3. setlocale()

Set the locale, which will affect how number format information is formatted.

grammar:

setlocale(int $cateGory, string $locale)

parameter:

• $category: The locale category to set (e.g., LC_ALL, LC_NUMERIC)
• $locale: Locale identifier (e.g., "en_US", "de_DE")

Example:

setlocale(LC_ALL, "en_US");
echo number_format(1234567.89); // 1,234,567.89

4. PHP_FLOAT_DIG

Get the precision of floating point numbers.

grammar:

PHP_FLOAT_DIG

constant:

Represents a small integer with floating point precision.

Example:

echo PHP_FLOAT_DIG; // 15

5. PHP_INT_SIZE

Get the number of digits in the integer.

grammar:

PHP_INT_SIZE

constant:

represents an integer with an integer number of digits.

Example:

echo PHP_INT_SIZE; // 4 or 8 (depending on system) 

These functions provide a wide range of options for obtaining information about the number format, making it easy to display the number in the desired format.

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