Collator::compare

collator_compare

(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)

Collator::compare -- collator_compare — Compare two Unicode strings

說(shuō)明

面向?qū)ο箫L(fēng)格

public Collator::compare(string $string1, string $string2): int|false

過(guò)程化風(fēng)格

collator_compare(Collator $object, string $string1, string $string2): int|false

Compare two Unicode strings according to collation rules.

參數(shù)

object

Collator object.

string1

The first string to compare.

string2

The second string to compare.

返回值

Return comparison result:

  • 1 if string1 is greater than string2 ;

  • 0 if string1 is equal to string2;

  • -1 if string1 is less than string2 .

Returns false on failure.

警告

此函數(shù)可能返回布爾值 false，但也可能返回等同于 false 的非布爾值。請(qǐng)閱讀 布爾類(lèi)型章節(jié)以獲取更多信息。應(yīng)使用 === 運(yùn)算符來(lái)測(cè)試此函數(shù)的返回值。

范例

示例 #1 collator_compare() example

<?php
$s1 = 'Hello';
$s2 = 'hello';

$coll = collator_create( 'en_US' );
$res  = collator_compare( $coll, $s1, $s2 );

if ($res === false) {
    echo collator_get_error_message( $coll );
} else if( $res > 0 ) {
    echo "s1 is greater than s2\n";
} else if( $res < 0 ) {
    echo "s1 is less than s2\n";
} else {
    echo "s1 is equal to s2\n";
}
?>

以上例程會(huì)輸出：


s1 is greater than s2

示例 #2 Comparing strings without diacritics or case-sensitivity

<?php
$c = new Collator( 'en' );
$c->setStrength( Collator::PRIMARY );

if ( $c->compare( 'Séan', 'Sean' ) == 0 )
{
    echo "The same\n";
}

以上例程會(huì)輸出：


The same

This example instructs the collator to compare with only taking the base characters into account. The documentation for Collator->setStrength() explains the different strengths.

參見(jiàn)