Strings
PHP Manual

str_word_count

(PHP 4 >= 4.3.0, PHP 5)

str_word_count — Return information about words used in a string

说明

mixed str_word_count ( string $string [, int $format [, string $charlist ]] )

Counts the number of words inside string . If the optional format is not specified, then the return value will be an integer representing the number of words found. In the event the format is specified, the return value will be an array, content of which is dependent on the format . The possible value for the format and the resultant outputs are listed below.

For the purpose of this function, 'word' is defined as a locale dependent string containing alphabetic characters, which also may contain, but not start with "'" and "-" characters.

参数

string

The string

format

Specify the return value of this function. The current supported values are:

  • 0 - returns the number of words found
  • 1 - returns an array containing all the words found inside the string
  • 2 - returns an associative array, where the key is the numeric position of the word inside the string and the value is the actual word itself

charlist

A list of additional characters which will be considered as 'word'

返回值

Returns an array or an integer, depending on the format chosen.

更新日志

版本 说明
5.1.0 Added the charlist parameter

范例

Example#1 A str_word_count() example

<?php

$str = "Hello fri3nd, you're
       looking          good today!";

print_r(str_word_count($str, 1));
print_r(str_word_count($str, 2));
print_r(str_word_count($str, 1, 'àáãç3'));

echo str_word_count($str);

?>

上例将输出：

Array
(
    [0] => Hello
    [1] => fri
    [2] => nd
    [3] => you're
    [4] => looking
    [5] => good
    [6] => today
)

Array
(
    [0] => Hello
    [6] => fri
    [10] => nd
    [14] => you're
    [29] => looking
    [46] => good
    [51] => today
)

Array
(
    [0] => Hello
    [1] => fri3nd
    [2] => you're
    [3] => looking
    [4] => good
    [5] => today
)

7

参见

Strings
PHP Manual