Detailed explanation of how to use str_replace to replace multi-dimensional arrays in PHP

This article mainly introduces the implementation method of PHP using str_replace to replace multi-dimensional arrays. It combines specific examples to compare and analyze the implementation skills and precautions related to PHP's traversal and replacement operations for multi-dimensional arrays. Friends in need can refer to the following

In PHP, if you use str_replace to replace strings in an array, you can only replace a one-dimensional array. If it is a multi-dimensional array, you cannot replace all strings. So I wrote a method to realize the replacement of multi-dimensional array strings.

First, let’s test the replacement of arrays by directly using str_replace

$a = array(
'a' => 'bdc#',
'ceshi' => array('c'=>array('f'=>'#'))
);
$a = str_replace('#', 'ccc', $a);
var_dump($a);

The output is found as follows:

array (size=2)
 'a' => string 'bdcccc' (length=6)
 'ceshi' =>
  array (size=1)
   'c' =>
    array (size=1)
     'f' => string '#' (length=1)

It is found that only the strings in the one-dimensional array are replaced, and arrays with more dimensions are not replaced.

Function implements string replacement of multi-dimensional arrays

$a = array(
'a' => 'bdc#',
'ceshi' => array('c'=>array('f'=>'#'))
);
function strReplace(&$array) {
 $array = str_replace('#', 'ccc', $array);
if (is_array($array)) {
  foreach ($array as $key => $val) {
    if (is_array($val)) {
      strReplace($array[$key]);
    }
  }
}
}
strReplace($a);
var_dump($a);

The output is as follows:

array (size=2)
 'a' => string 'bdcccc' (length=6)
 'ceshi' =>
  array (size=1)
   'c' =>
    array (size=1)
     'f' => string 'ccc' (length=3)

Found that string replacement for multi-dimensional arrays is implemented

The function strReplace passes in the address of the array and replaces the string recursively. Of course, this is just a very simple method, there are many ways to implement it, just like it!

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