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php str_pad 函数使用详解

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Release: 2016-06-13 12:25:08
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string str_pad ( string , int pad_length , string pad_string , int pad_type);
string 指定字符串,pad_length指定长度,pad_string用来填充的字符串(可选参数),pad_type指定填充位置(可选参数,STR_PAD_LEFT,STR_PAD_BOTH);
如果pad_string , pad_type均为空,那么就等于默认pad_string 为空格, pad_type就是自动填充在指定字符串的末端.

复制代码 代码如下:



$string = "test";
echo str_pad($string , 10); // produces "test ";
?>


其余两个例子:

复制代码 代码如下:



$string = "test";
echo str_pad($string , 10,'+',STR_PAD_LEFT); // produces "++++++test";
?>


复制代码 代码如下:



$string = "test";
echo str_pad($string , 10,'+',STR_PAD_BOTH); // produces "+++test+++";
?>

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