php 检查多个 strpos 值

Checking for multiple strpos values

提问by Chad Cardiff

I am wondering how to complete multiple strpos checks.

我想知道如何完成多个 strpos 检查。

Let me clarify:
I want strpos to check the variable "COLOR" to see if any numbers from 1 to 8 are anywhere in the variable. If any numbers from 1 to 8 are present, I want to echo "selected".

让我澄清一下：
我希望 strpos 检查变量“COLOR”以查看变量中是否有从 1 到 8 的任何数字。如果存在从 1 到 8 的任何数字，我想回显“已选择”。

Examples:
Let's say only the number 1 is in the variable, it willecho "selected".
Let's say the numbers 1 2 and 3 are in the variable, it willecho "selected."
Let's say the numbers 3 9 25 are in the variable, it willecho "selected" (because of that 3!!).
Let's say only the number 9 is in the variable, it will NOTecho.
Let's say the numbers 9 25 48 are in the variable, it will NOTecho.

示例：
假设变量中只有数字 1，它会回显“selected”。
比方说，数字1 2和3是在变量，它会回声“选择”。
假设数字 3 9 25 在变量中，它会回显“selected”（因为那个 3 ！！）。
假设变量中只有数字 9，它不会回显。
假设数字 9 25 48 在变量中，它不会回显。

回答by Chad Cardiff

I just used the OR statement (||)

我刚刚使用了 OR 语句 (||)

<?php 
  if (strpos($color,'1') || strpos($color,'2') || strpos($color,'3') || strpos($color,'4') || strpos($color,'5') || strpos($color,'6') || strpos($color,'7') || strpos($color,'8') === true) 
   {
    //do nothing
   } else { 
            echo "checked"; 
          } 
?>

回答by user3270784

try preg match for multiple

尝试预匹配多个

if (preg_match('/word|word2/i', $str))

strpos() with multiple needles?

strpos() 多针？

回答by user3270784

I found the above answers incomplete and came up with my own function:

我发现上述答案不完整，并提出了我自己的功能：

/**
 * Multi string position detection. Returns the first position of $check found in 
 * $str or an associative array of all found positions if $getResults is enabled. 
 * 
 * Always returns boolean false if no matches are found.
 *
 * @param   string         $str         The string to search
 * @param   string|array   $check       String literal / array of strings to check 
 * @param   boolean        $getResults  Return associative array of positions?
 * @return  boolean|int|array           False if no matches, int|array otherwise
 */
function multi_strpos($string, $check, $getResults = false)
{
  $result = array();
  $check = (array) $check;

  foreach ($check as $s)
  {
    $pos = strpos($string, $s);

    if ($pos !== false)
    {
      if ($getResults)
      {
        $result[$s] = $pos;
      }
      else
      {
        return $pos;          
      }
    }
  }

  return empty($result) ? false : $result;
}

Usage:

用法：

$string  = "A dog walks down the street with a mouse";
$check   = 'dog';
$checks  = ['dog', 'cat', 'mouse'];

#
# Quick first position found with single/multiple check
#

  if (false !== $pos = multi_strpos($string, $check))
  {
    echo "$check was found at position $pos<br>";
  }

  if (false !== $pos = multi_strpos($string, $checks))
  {
    echo "A match was found at position $pos<br>";
  }

#
# Multiple position found check
#

  if (is_array($found = multi_strpos($string, $checks, true)))
  {
    foreach ($found as $s => $pos)
    {
      echo "$s was found at position $pos<br>";         
    }       
  }

回答by MaxEcho

If all value is seperated by a space in value then you can do the following. Otherwise ignore it.

如果所有值都由值中的空格分隔，那么您可以执行以下操作。否则忽略它。

It is needed because if you have $color="25";then strposwill found both 2, 5 and 25 so required result will not come

它是必需的，因为如果你有$color="25";那么strpos会发现 2、5 和 25 所以所需的结果不会出现

<?php
$color='1 25 48 9 3';
$color_array = explode(" ",$color);

$find = range(1,8);//array containing 1 to 8

$isFound = false;
foreach($find as $value) {
    if(in_array($value, $color_array)) 
    {
        $isFound = true;
        break;
    }
}

if($isFound) {
    echo "Selected";
}
?>

回答by hakiko

if (preg_match('/string1|string2|string3/i', $str)){
  //if one of them found
}else{
 //all of them can not found
}

回答by mickmackusa

A simple preg_match()call using wordboundaries around a numeric character class will be completely accurate and suitable for your task.

preg_match()在数字字符类周围使用字边界的简单调用将完全准确并适合您的任务。

The word boundary metacharacters ensure that full-integer matching is executed -- no false positive (partial) matching occurs.

单词边界元字符确保执行全整数匹配——不会发生误报（部分）匹配。

Code: (Demo)

代码：（演示）

$array = array(
    'text 1 2 and 3 text',
    'text 3 9 25 text',
    'text 9 25 48 text',
);

foreach ($array as $color) {
    echo "\n---\n$color";
    echo "\n\t" , preg_match('~\b[1-8]\b~', $color, $out) ? "checked (satisfied by {$out[0]})" : 'not found';
    echo "\n\tChad says: " , (strpos($color,'1') || strpos($color,'2') || strpos($color,'3') || strpos($color,'4') || strpos($color,'5') || strpos($color,'6') || strpos($color,'7') || strpos($color,'8') ? 'found' : 'not found');
}

Output:

输出：

---
text 1 2 and 3 text
    checked (satisfied by 1)
    Chad says: found
---
text 3 9 25 text
    checked (satisfied by 3)
    Chad says: found
---
text 9 25 48 text
    not found
    Chad says: found

As for how to implement this technique in your script...

至于如何在你的脚本中实现这种技术......

if (!preg_match('~\b[1-8]\b~', $color)) {
    echo 'checked';
}

回答by Nenad Jeremic

I had similar needs so here is function that get position of closest substring in given string, where search substrings are provided in array. It also pass by reference matched substring. Note that order matters in case some substring contains other substring - example: '...' and '.'.

我有类似的需求，所以这里是获取给定字符串中最近子字符串位置的函数，其中搜索子字符串在数组中提供。它还通过引用匹配的子字符串传递。请注意，如果某些子字符串包含其他子字符串，则顺序很重要 - 例如：'...' 和 '.'。

function strpos_arr($haystack, $needleN, $offset = 0, &$needle = '') {
  if (!is_array($needleN)) {
    return strpos($haystack, $needleN, $offset);
  } else {
    $res = FALSE;
    foreach ($needleN as $ind => $item) {
      $pos = strpos($haystack, $item, $offset);
      if ($pos !== FALSE && ($res === FALSE || $pos < $res)) {
        $res = $pos;
        $needle = $item;
      }
    }
    return $res;
  }
}