stream_bucket_prepend()

(PHP 5, PHP 7)

Prepend bucket to brigade

说明

stream_bucket_prepend(resource $brigade,object $bucket): void

This function can be called to prepend a bucket to a bucket brigade. It is typically called fromphp_user_filter::filter().

参数

$brigade

$brigadeis a resource pointing to abucket brigadewhich contains one or morebucketobjects.

$bucket

A bucket object.

返回值

没有返回值。

范例

Example #1stream_bucket_prepend()examples

<?php
class foo extends php_user_filter {
  protected $calls = 0;
  public function filter($in, $out, &$consumed, $closing) {
    while ($bucket = stream_bucket_make_writeable($in)) {
      $consumed += $bucket->datalen;
      if ($this->calls++ == 2) {
        // This bucket will appear again before any other bucket.
        stream_bucket_prepend($in, $bucket);
      }
    }
    return PSFS_FEED_ME;
  }
}
stream_filter_register('test', 'foo');
print  file_get_contents('php://filter/read=test/resource=foo');
?>