在 php 数组中搜索部分字符串匹配
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search a php array for partial string match
提问by Nivin
I have an array and I'd like to search for the string 'green'. So in this case it should return the $arr[2]
我有一个数组，我想搜索 string 'green'。所以在这种情况下它应该返回$arr[2]
$arr = array(0 => 'blue', 1 => 'red', 2 => 'green string', 3 => 'red');
is there any predefined function like in_array() that does the job rather than looping through itand compare each values?
有没有像 in_array() 这样的预定义函数来完成这项工作而不是循环遍历它并比较每个值？
采纳答案by smitrp
You can use array_search function of php. It's supported in PHP >= 4.0.5.
您可以使用 php 的 array_search 函数。PHP >= 4.0.5 支持它。
$array = array(0 => 'blue', 1 => 'red', 2 => 'green string', 3 => 'red');
$m_array = preg_grep('/^green\s.*/', $array);
$m_arraycontains matched elements of array.
$m_array包含匹配的数组元素。
回答by n a
For a partial matchyou can iterate the array and use a string search function like strpos().
对于部分匹配，您可以迭代数组并使用字符串搜索函数，如strpos()。
function array_search_partial($arr, $keyword) {
foreach($arr as $index => $string) {
if (strpos($string, $keyword) !== FALSE)
return $index;
}
}
For an exact match, use in_array()
对于精确匹配，使用in_array()
in_array('green', $arr)
回答by Quasdunk
There are several ways...
有几种方法...
$arr = array(0 => 'blue', 1 => 'red', 2 => 'green string', 3 => 'red');
Search the array with a loop:
用循环搜索数组：
$results = array();
foreach ($arr as $value) {
if (strpos($value, 'green') !== false) { $results[] = $value; }
}
if( empty($results) ) { echo 'No matches found.'; }
else { echo "'green' was found in: " . implode('; ', $results); }
Use array_filter():
使用 array_filter()：
$results = array_filter($arr, function($value) {
return strpos($value, 'green') !== false;
});
In order to use Closures with other arguments there is the use-keyword. So you can abstract it and wrap it into a function:
为了将闭包与其他参数一起使用，需要使用use-keyword。所以你可以抽象它并将它包装成一个函数：
function find_string_in_array ($arr, $string) {
return array_filter($arr, function($value) use ($string) {
return strpos($value, $string) !== false;
});
}
$results = find_string_in_array ($arr, 'green');
if( empty($results) ) { echo 'No matches found.'; }
else { echo "'green' was found in: " . implode('; ', $results); }
Here's a working example: http://codepad.viper-7.com/xZtnN7
这是一个工作示例：http: //codepad.viper-7.com/xZtnN7
回答by Kotzilla
for search with like as sql with '%needle%' you can try with
对于像 sql with '%needle%' 的搜索，您可以尝试使用
$input = preg_quote('gree', '~'); // don't forget to quote input string!
$data = array(
1 => 'orange',
2 => 'green string',
3 => 'green',
4 => 'red',
5 => 'black'
);
$result = preg_filter('~' . $input . '~', null, $data);
and result is
结果是
{
"2": " string",
"3": ""
}
回答by dev_dodiya
<?php
$a=array("a"=>"red","b"=>"green","c"=>"blue");
echo array_search("red",$a);
?>
I have same problem so try this...
我有同样的问题，所以试试这个...
回答by MrCode
PHP 5.3+
PHP 5.3+
array_walk($arr, function($item, $key) {
if(strpos($item, 'green') !== false) {
echo 'Found in: ' . $item . ', with key: ' . $key;
}
});
回答by Louis.CLast
function check($string)
{
foreach($arr as $a) {
if(strpos($a,$string) !== false) {
return true;
}
}
return false;
}
回答by hirre
function findStr($arr, $str)
{
foreach ($arr as &$s)
{
if(strpos($s, $str) !== false)
return $s;
}
return "";
}
You can change the return value to the corresponding index number with a little modification if you want, but since you said "...return the $arr[2]" I wrote it to return the value instead.
如果需要，您可以通过稍加修改将返回值更改为相应的索引号，但是由于您说“...返回 $arr[2]”，我将它写为返回值。
回答by phoenix
A quick search for a phrase in the entire array might be something like this:
在整个数组中快速搜索一个短语可能是这样的：
if (preg_match("/search/is", var_export($arr, true))) {
// match
}
回答by Andrei Kravtsov
In order to find out if UTF-8 case-insensitive substring is present in array, I found that this method would be much faster than using mb_strtolower or mb_convert_case:
为了找出数组中是否存在 UTF-8 不区分大小写的子字符串，我发现这种方法比使用 mb_strtolower 或 mb_convert_case 快得多：
Implode the array into a string: $imploded=implode(" ", $myarray);.
Convert imploded string to lowercase using custom function: $lowercased_imploded = to_lower_case($imploded);
function to_lower_case($str) {
将数组内爆为字符串：$imploded=implode(" ", $myarray); .
使用自定义函数将内爆字符串转换为小写： $lowercased_imploded = to_lower_case($imploded);
函数 to_lower_case($str) {
$from_array=["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","?","?","ü","?","?","?"];
$from_array=["A","B","C","D","E","F","G","H","I","J","K","L ","M","N","O","P","Q","R","S","T","U","V","W","X", "Y","Z","?","?","ü","?","?","?"];
$to_array=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","?","?","ü","?","?","?"];
$to_array=["a","b","c","d","e","f","g","h","i","j","k","l ","m","n","o","p","q","r","s","t","u","v","w","x", "y","z","?","?","ü","?","?","?"];
foreach($from_array as $key=>$val){$str=str_replace($val, $to_array[$key], $str);}
foreach($from_array as $key=>$val){$str=str_replace($val, $to_array[$key], $str);}
return $str;
返回 $str;
}
}
- Search for match using ordinary strpos: if(strpos($lowercased_imploded, "substring_to_find")!==false){do something}
- 使用普通的 strpos 搜索匹配项：if(strpos($lowercased_imploded, "substring_to_find")!==false){do something}
