时间:2021-07-01 10:21:17 帮助过:3人阅读
例:substr('php教程 is very good language',4,5);
输出为 is ve;
当start>str的长度,则返回为();
substr('php is very good language',26,5);
substr('php is very good language',4);
输出为 (空白)
输出为is v (表明start和langth都为4)
当start为负值,则从str末尾出开始读起(*这时是从-1开始读,而不是从0开始),
substr('php is very good language',-4,5);
输出为uage
当length为负值时,length代表的是从末尾开始读,截取str的结束位置。
substr('php is very good language',4,-5);
输出为is very good lan
explode()把函数字符串分割为数组;
// example 1
$pizza = "piece1 piece2 piece3 piece4 piece5 piece6";
$pieces = explode(" ", $pizza);
echo $pieces[0]; // piece1
echo $pieces[1]; // piece2
// example 2
$data = "foo:*:1023:1000::/home/foo:/bin/sh";
list($user, $pass, $uid, $gid, $gecos, $home, $shell) = explode(":", $data);
echo $gecos."
"; // foo
echo $shell; // *
strrev()把字符串从后往前输出
echo strrev("june"); // outputs "enuj"
setlocalhost(content location)设置本地环境.content ,指定需要设置的场景信息常量有(
lc_all – 所有下属的常量
lc_collate – 排列顺序
lc_ctype – 字符分类和转换(例如:将所有的字符转换成小写或大写形式)
lc_messages – 系统信息格式
lc_monetary – 货币 / 通货格式
lc_numeric – 数值格式
lc_time – 日期和时间格式
);location,设置国家区域,例如,chs.
http://www.bkjia.com/PHPjc/445364.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/445364.htmlTechArticlesubstr(str,start,length); 例:substr(php教程 is very good language,4,5); 输出为 is ve; 当startstr的长度,则返回为(); substr(php is very good language,26,5); s...