An even shorter way to run a match on the array's keys rather than the values:
<?php
function preg_grep_keys($pattern, $input, $flags = 0) {
return array_flip( preg_grep($pattern, array_flip($input), $flags ) );
}
?>
(PHP 4, PHP 5, PHP 7)
preg_grep — 返回匹配模式的数组条目
$pattern
, array $input
[, int $flags = 0
] )
返回给定数组input中与模式pattern
匹配的元素组成的数组.
pattern要搜索的模式, 字符串形式.
input输入数组.
flags
如果设置为PREG_GREP_INVERT, 这个函数返回输入数组中与
给定模式pattern不匹配的元素组成的数组.
返回使用input中key做索引的数组.
Example #1 preg_grep() 示例
<?php
// 返回所有包含浮点数的元素
$fl_array = preg_grep("/^(\d+)?\.\d+$/", $array);
?>
An even shorter way to run a match on the array's keys rather than the values:
<?php
function preg_grep_keys($pattern, $input, $flags = 0) {
return array_flip( preg_grep($pattern, array_flip($input), $flags ) );
}
?>
A very simple example to match multiple "."(dot) in an array value:-
<?php
$array = array("23.32","22","12.009","23.43.43");
print_r(preg_grep("/^(\d+)?\.\d+\.\d+$/",$array));
?>
A shorter way to run a match on the array's keys rather than the values:
<?php
function preg_grep_keys($pattern, $input, $flags = 0) {
return array_intersect_key($input, array_flip(preg_grep($pattern, array_keys($input), $flags)));
}
?>
Run a match on the array's keys rather than the values:
<?php
function preg_grep_keys( $pattern, $input, $flags = 0 )
{
$keys = preg_grep( $pattern, array_keys( $input ), $flags );
$vals = array();
foreach ( $keys as $key )
{
$vals[$key] = $input[$key];
}
return $vals;
}
?>