PHP技术编程中“字符串”的小常识(2)

3.14 3.143.1415900000abcdefghi 3.14,3.141590, 3.142\m1111011 123 123.000000 test

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2.字符串填充

string str_pad(string input原始字串, int length添加后的总长度[, string padding要填充的字符 [, int pad_type]填充类型])

填充类型有添加在左边STR_PAD_LEFT，默认添在右边，填充在两端STR_PAD_BOTH

$index = array("one"=>1,"two"=>155,"three"=>1679);

echo "

";

echo str_pad("这是标题",50," ",STR_PAD_BOTH)."\n";

foreach($index as $inkey=>$inval)

echo str_pad($inkey,30,".").str_pad($inval,20,".",STR_PAD_LEFT)."\n";

echo "

";

---------------------输出结果----------------------------------------

这是标题

one..............................................1

two............................................155

three.........................................1679

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string strtolower(string subject)//转换为小写