PHP之php基础函数_优就业

php根基函数

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<?php

//生成随机数 和 光阴函数

//echo rand();

//echo "<br>";

//echo rand(0,10);

//echo time();//光阴戳

//2017-02-10 08:46:12

date_default_timezone_set("Asia/Shanghai");

//echo date("Y-m-d h:i:s");//默认转换当前光阴

//echo date("Y-m-d h:i:s",'1386688343');

//echo strtotime("2013-12-10 11:12:23");

//字符串的处置

$str = 'Hello World!!!';

//echo strlen($str);

//$str1='Abc';

//$str2='abc';

//echo strcmp($str1,$str2);

//echo strcasecmp($str1,$str2);

echo strtoupper($str2);

echo strtolower($str1);

//$str = "a|B|c|d";

//$str1 = explode("|",$str);

//echo implode("&",$str1);

//echo substr($str,1,3);

//echo str_replace("|","&",$str);

//echo substr_replace($str,"%",1,1);

$str = "hello3 world4 ashdf223sdfa2323sd45454";

//preg_match("/\d/",$str,$str2);

//preg_match_all("/\d/",$str,$str3);

//var_dump($str3);

//$str4 = preg_replace("/\d/", "数字", $str);

//var_dump($str4);

$str5 = preg_split("/\d/",$str);

var_dump($str5);

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