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(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)
Collator::compare -- collator_compare — Compare two Unicode strings
面向对象风格
$string1, string $string2): int|false
过程化风格
Compare two Unicode strings according to collation rules.
object
Collator object.
string1
The first string to compare.
string2
The second string to compare.
Return comparison result:
1 if string1 is greater than
string2 ;
0 if string1 is equal to
string2;
-1 if string1 is less than
string2 .
false on failure.
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";
}
?>
以上例程会输出：
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";
}
以上例程会输出：
This example instructs the collator to compare with only taking the base characters into account. The documentation for Collator->setStrength() explains the different strengths.
