If you're looking for the pattern syntax, their documentation is here: http://unicode.org/reports/tr35/tr35-numbers.html#Number_Format_Patterns(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)
NumberFormatter::setPattern -- numfmt_set_pattern β Π£ΡΡΠ°Π½Π°Π²Π»ΠΈΠ²Π°Π΅Ρ ΡΠ°Π±Π»ΠΎΠ½ ΡΡΠ΅Π΄ΡΡΠ²Π° ΡΠΎΡΠΌΠ°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ
ΠΠ±ΡΠ΅ΠΊΡΠ½ΠΎ-ΠΎΡΠΈΠ΅Π½ΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠΉ ΡΡΠΈΠ»Ρ
ΠΡΠΎΡΠ΅Π΄ΡΡΠ½ΡΠΉ ΡΡΠΈΠ»Ρ
Π£ΡΡΠ°Π½Π°Π²Π»ΠΈΠ²Π°Π΅Ρ ΡΠ°Π±Π»ΠΎΠ½, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΠΌΡΠΉ ΡΡΠ΅Π΄ΡΡΠ²ΠΎΠΌ ΡΠΎΡΠΌΠ°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ. ΠΠ΅ ΠΌΠΎΠΆΠ΅Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°ΡΡΡΡ Π² ΡΡΠ΅Π΄ΡΡΠ²Π΅ ΡΠΎΡΠΌΠ°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠ°Π²ΠΈΠ».
formatterΠΠ±ΡΠ΅ΠΊΡ NumberFormatter.
patternΠ¨Π°Π±Π»ΠΎΠ½ Π² ΡΠΈΠ½ΡΠ°ΠΊΡΠΈΡΠ΅, ΠΎΠΏΠΈΡΠ°Π½Π½ΠΎΠΌ Π² » докΡΠΌΠ΅Π½ΡΠ°ΡΠΈΠΈ ICU DecimalFormat.
Π€ΡΠ½ΠΊΡΠΈΡ Π²ΠΎΠ·Π²ΡΠ°ΡΠ°Π΅Ρ true, Π΅ΡΠ»ΠΈ Π²ΡΠΏΠΎΠ»Π½ΠΈΠ»Π°ΡΡ ΡΡΠΏΠ΅ΡΠ½ΠΎ, ΠΈΠ»ΠΈ false, Π΅ΡΠ»ΠΈ Π²ΠΎΠ·Π½ΠΈΠΊΠ»Π° ΠΎΡΠΈΠ±ΠΊΠ°.
ΠΡΠΈΠΌΠ΅Ρ #1 ΠΡΠΈΠΌΠ΅Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ numfmt_set_pattern()
<?php
$fmt = numfmt_create( 'de_DE', NumberFormatter::DECIMAL );
echo "Π¨Π°Π±Π»ΠΎΠ½: ".numfmt_get_pattern($fmt)."\n";
echo numfmt_format($fmt, 1234567.891234567890000)."\n";
numfmt_set_pattern($fmt, "#0.# kg");
echo "Π¨Π°Π±Π»ΠΎΠ½: ".numfmt_get_pattern($fmt)."\n";
echo numfmt_format($fmt, 1234567.891234567890000)."\n";
?>ΠΡΠΈΠΌΠ΅Ρ #2 ΠΡΠΈΠΌΠ΅Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π² ΠΎΠ±ΡΠ΅ΠΊΡΠ½ΠΎ-ΠΎΡΠΈΠ΅Π½ΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΌ ΡΡΠΈΠ»Π΅
<?php
$fmt = new NumberFormatter( 'de_DE', NumberFormatter::DECIMAL );
echo "Π¨Π°Π±Π»ΠΎΠ½: ".$fmt->getPattern()."\n";
echo $fmt->format(1234567.891234567890000)."\n";
$fmt->setPattern("#0.# kg");
echo "Π¨Π°Π±Π»ΠΎΠ½: ".$fmt->getPattern()."\n";
echo $fmt->format(1234567.891234567890000)."\n";
?>Π Π΅Π·ΡΠ»ΡΡΠ°Ρ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ΠΈΡ ΠΏΡΠΈΠ²Π΅Π΄ΡΠ½Π½ΠΎΠ³ΠΎ ΠΏΡΠΈΠΌΠ΅ΡΠ°:
Π¨Π°Π±Π»ΠΎΠ½: #,##0.### 1.234.567,891 Π¨Π°Π±Π»ΠΎΠ½: #0.# kg 1234567,9 kg
If you're looking for the pattern syntax, their documentation is here: http://unicode.org/reports/tr35/tr35-numbers.html#Number_Format_PatternssetPattern appears to influence only the behavior of the format method, not the parse method of the NumberFormatter object.
$pattern = '#,##0';
$frmtr = NumberFormatter::create('en-US', NumberFormatter::DECIMAL);
$frmtr->setPattern($pattern);
echo $frmtr->parse('12.345');
// returns 12