php分裂大数字(如爆炸)

Question

我需要php explode()的功能,但没有分隔符.

例如,将变量"12345"转换为数组,单独保存每个数字.

这可能吗？我已经谷歌搜索但只发现爆炸(),似乎没有用.

谢谢!

Answer 1

与PHP中的任何字符串:

$foo="12345";
echo $foo[0];//1
echo $foo[1];//2
//etc

或者(来自手册中的preg_split())页面

$str = 'string';
$chars = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);
print_r($chars);

更好的:

$str = 'string';
$chars=str_split($str, 1)
print_r($chars);

preg_split()与str_split()的基准

 function microtime_float()
{
    list($usec, $sec) = explode(" ", microtime());
    return ((float)$usec + (float)$sec);
}


$str = '12345';
$time_start = microtime_float();
for ($i = 0; $i <100000; $i++) {
$chars = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);
//$chars=str_split($str, 1);
}
$time_end = microtime_float();
$time = $time_end - $time_start;

echo "$time seconds\n";

结果:

str_split  =0.69
preg_split =0.9