PHP分割字符串成数组
使用exploder()函数，explode(string $delimiter, string $string)，第一个参数为分割依据，即按照什么格式分割字符串
第二个参数为分割对象，即为需要分割的字符串变量
返回值为分割好的数组
1、字符串：$str = "Hello world. It's a beautiful day.";
2、$strArray = explode(@" ", $str);
3、print_r (strArray);
strArray(
=> Hello
=> world.
=> It's
=> a
=> beautiful
=> day.
)
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