Tag Archives: PHP常用函数

三 29

php常用基本函数

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15个PHP常用函数

1.统计数组元素个数

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$arr = array(
'1011,1003,1008,1001,1000,1004,1012',
'1009',
'1011,1003,1111'
);
$result = array();
foreach ($arr as $str) {
$str_arr = explode(',', $str);
foreach ($str_arr as $v) {
// $result[$v] = isset($result[$v]) ? $result[$v] : 0;
// $result[$v] = $result[$v] + 1;
$result[$v] = isset($result[$v]) ? $result[$v]+1 : 1;
}
}
print_r($result);
//Array
(
[1011] => 2
[1003] => 2
[1008] => 1
[1001] => 1
[1000] => 1
[1004] => 1
[1012] => 1
[1009] => 1
[1111] => 1
)

2. 循环删除目录

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function cleanup_directory($dir) {
foreach (new DirectoryIterator($dir) as $file) {
if ($file->isDir()) {
if (! $file->isDot()) {
cleanup_directory($file->getPathname());
}
} else {
unlink($file->getPathname());
}
}
rmdir($dir);
}

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