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xiaozi 2015-04-02 20:00:24

php中,sleep是不支持浮点的，zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &num)；在分析参数的时候就会转换成 int

php php 
<?php

sleep(.01); // sleep(0);

usleep(10000);

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