PHP小函数

1、range()

建立一个包含指定范围单元的数组

array range ( mixed $start , mixed $limit [, number $step = 1 ] )

<?php// array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)foreach (range(0, 12) as $number) {    echo $number;}// The step parameter was introduced in 5.0.0// array(0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100)foreach (range(0, 100, 10) as $number) {    echo $number;}?>

2、htmlspecialchars()

预定义的字符转换为 HTML 实体

string htmlspecialchars ( string $string [, int $flags = ENT_COMPAT | ENT_HTML401 [, string $encoding = ini_get("default_charset") [, bool $double_encode = true ]]] )

<?php$new = htmlspecialchars("<a href='test'>Test</a>", ENT_QUOTES,'utf-8');echo $new; // &lt;a href=&#039;test&#039;&gt;Test&lt;/a&gt;?>