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  • Collator::compare()

    collator_compare

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

    Compare two Unicode strings

    说明

    面向对象风格
    publicCollator::compare(string $str1,string $str2): int
    过程化风格
    collator_compare(Collator$coll,string $str1,string $str2): int

    Compare two Unicode strings according to collation rules.

    参数

    $coll

    Collator object.

    $str1

    The first string to compare.

    $str2

    The second string to compare.

    返回值

    Return comparison result:

    • 1 if$str1isgreaterthan$str2;

    • 0 if$str1isequalto$str2;

    • -1 if$str1islessthan$str2.

    On error booleanFALSE is returned.

    Warning

    此函数可能返回布尔值FALSE,但也可能返回等同于FALSE的非布尔值。请阅读布尔类型章节以获取更多信息。应使用===运算符来测试此函数的返回值。

    范例

    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:


    s1 is greater than s2

    参见

    • collator_sort() Sort array using specified collator