Gets the number of recurrences

# DatePeriod::getRecurrences

(PHP 7 >= 7.2.17/7.3.4, PHP 8)

DatePeriod::getRecurrences — Gets the number of recurrences

### 说明

面向对象风格

public function DatePeriod::getRecurrences(): ?int

Get the number of recurrences.

### 参数

此函数没有参数。

### 返回值

The number of recurrences as set by explicitly passing the `$recurrences` to the constructor of the DatePeriod class, or `null` otherwise.

### 示例

示例 #1 Different values for DatePeriod::getRecurrences()

    <?php
    $start = new DateTime('2018-12-31 00:00:00');
    $end   = new DateTime('2021-12-31 00:00:00');
    $interval = new DateInterval('P1M');
    $recurrences = 5;

    // recurrences explicitly set through the constructor
    $period = new DatePeriod($start, $interval, $recurrences, DatePeriod::EXCLUDE_START_DATE);
    echo $period->getRecurrences(), "\n";

    $period = new DatePeriod($start, $interval, $recurrences);
    echo $period->getRecurrences(), "\n";

    $period = new DatePeriod($start, $interval, $recurrences, DatePeriod::INCLUDE_END_DATE);
    echo $period->getRecurrences(), "\n\n";

    // recurrences not set in the constructor
    $period = new DatePeriod($start, $interval, $end);
    var_dump($period->getRecurrences());

    $period = new DatePeriod($start, $interval, $end, DatePeriod::EXCLUDE_START_DATE);
    var_dump($period->getRecurrences());

以上示例会输出：

    5
    5
    5

    NULL
    NULL

### 参见

- DatePeriod::$recurrences

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