php 在指定位置插入字符串
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Insert string at specified position
提问by Alex
Is there a PHP function that can do that?
有没有可以做到这一点的PHP函数？
I'm using strposto get the position of a substring and I want to insert a stringafter that position.
我正在使用strpos获取子字符串的位置，我想string在该位置之后插入一个。
回答by urmaul
$newstr = substr_replace($oldstr, $str_to_insert, $pos, 0);
回答by Tim Cooper
$str = substr($oldstr, 0, $pos) . $str_to_insert . substr($oldstr, $pos);
回答by alexdets
Try it, it will work for any number of substrings
试试看，它适用于任意数量的子字符串
<?php
$string = 'bcadef abcdef';
$substr = 'a';
$attachment = '+++';
//$position = strpos($string, 'a');
$newstring = str_replace($substr, $substr.$attachment, $string);
// bca+++def a+++bcdef
?>
回答by user2958137
Use the stringInsert function rather than the putinplace function. I was using the later function to parse a mysql query. Although the output looked alright, the query resulted in a error which took me a while to track down. The following is my version of the stringInsert function requiring only one parameter.
使用 stringInsert 函数而不是 putinplace 函数。我正在使用后面的函数来解析 mysql 查询。虽然输出看起来不错，但查询导致了一个错误，我花了一段时间才找到。以下是我的 stringInsert 函数版本，只需要一个参数。
function stringInsert($str,$insertstr,$pos)
{
$str = substr($str, 0, $pos) . $insertstr . substr($str, $pos);
return $str;
}
回答by xdazz
str_replace($sub_str, $insert_str.$sub_str, $org_str);
回答by chiliNUT
Just wanted to add something: I found tim cooper's answer very useful, I used it to make a method which accepts an array of positions and does the insert on all of them so here that is:
只是想添加一些东西：我发现 tim cooper 的回答非常有用，我用它来制作一个方法，它接受一个位置数组并对所有位置进行插入，所以这里是：
EDIT:Looks like my old function assumed $insertstrwas only 1 character and that the array was sorted. This works for arbitrary character length.
编辑：看起来我的旧函数假设$insertstr只有 1 个字符并且数组已排序。这适用于任意字符长度。
function stringInsert($str, $pos, $insertstr) {
if (!is_array($pos)) {
$pos = array($pos);
} else {
asort($pos);
}
$insertionLength = strlen($insertstr);
$offset = 0;
foreach ($pos as $p) {
$str = substr($str, 0, $p + $offset) . $insertstr . substr($str, $p + $offset);
$offset += $insertionLength;
}
return $str;
}
回答by Ivijan Stefan Stipi?
I have one my old function for that:
我有一个我的旧功能：
function putinplace($string=NULL, $put=NULL, $position=false)
{
$d1=$d2=$i=false;
$d=array(strlen($string), strlen($put));
if($position > $d[0]) $position=$d[0];
for($i=$d[0]; $i >= $position; $i--) $string[$i+$d[1]]=$string[$i];
for($i=0; $i<$d[1]; $i++) $string[$position+$i]=$put[$i];
return $string;
}
// Explanation
$string='My dog dont love postman'; // string
$put="'"; // put ' on position
$position=10; // number of characters (position)
print_r( putinplace($string, $put, $position) ); //RESULT: My dog don't love postman
This is a small powerful function that performs its job flawlessly.
这是一个功能强大的小功能，可以完美地执行其工作。
回答by Lance Badger
This was my simple solution too append text to the next line after it found the keyword.
这是我的简单解决方案，也就是在找到关键字后将文本附加到下一行。
$oldstring = "This is a test\n#FINDME#\nOther text and data.";
function insert ($string, $keyword, $body) {
return substr_replace($string, PHP_EOL . $body, strpos($string, $keyword) + strlen($keyword), 0);
}
echo insert($oldstring, "#FINDME#", "Insert this awesome string below findme!!!");
Output:
输出：
This is a test
#FINDME#
Insert this awesome string below findme!!!
Other text and data.
回答by jewelhuq
Simple and another way to solve :
简单的另一种解决方法：
function stringInsert($str,$insertstr,$pos)
{
$count_str=strlen($str);
for($i=0;$i<$pos;$i++)
{
$new_str .= $str[$i];
}
$new_str .="$insertstr";
for($i=$pos;$i<$count_str;$i++)
{
$new_str .= $str[$i];
}
return $new_str;
}
回答by Ivan Ivan
function insSubstr($str, $sub, $posStart, $posEnd){
return mb_substr($str, 0, $posStart) . $sub . mb_substr($str, $posEnd + 1);
}
