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Homephp教程php手册php字符串分割函数explode的实例代码

在php中分割一个字符串,我们可以使用函数explode(),其原型如下

array explode (string $separator, string $string [, int $limit])

该函数有3个参数,第一个参数$separator设置一个分割字符(串)。第二个参数$string指定所要操作的字符串。$limit参数是可选的,指定最多将字符串分割为多少个子串。
该函数返回一个由被分割的子串组成的数组。

来看下面的例子,对一个由逗号分隔的多行文本数据进行分析。
例1,分割字符串。

 代码如下:

$this_year = 2013;
$text = <<< EOT
祝无双,F,1982,广东,普遍职员
李三兵,M,1981,河北,普通职员
赵朴秀,F,1980,韩国,项目经理
EOT;
$lines = explode("\n", $text); //将多行数据分开
foreach ($lines as $userinfo) {
$info = explode(",", $userinfo, 3); //仅分割前三个数据
$name = $info[0];
$sex = ($info[1] == "F")? "女" : "男";
$age = $this_year - $info[2];
echo "姓名: $name $sex . 年龄:$age
";
}
/* 输出结果是:
姓名:祝无双 女 年龄:31
姓名:李三兵 男 年龄:32
姓名:赵朴秀 女 年龄:33
*/
?>

以上代码,先对文本按行进行分割,然后将每行字符串按","进行分割,并取前三个数据进行处理分析,然后进行整理并输出。

另外,为大家介绍php的另一个内建函数implode(),用于连接数组成为字符串。

与分割字符串函数相对应的是implode()函数,它的别名函数叫做join(),函数原型分别如下。
string implode(string $glue, array $pieces)
string join(string $glue, array $pieces)

implode()或join()函数可以将数组$pieces中的元素用指定的字符$glue连接起来。
下面为大家举一个简单的例子,供学习参考。

例2:

 代码如下:

$fruits = array('apple', 'banana', 'pear');
$str = implode(", ", $fruits);
echo $str;
?>

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