PHP String Insert substring method summarize original PHP split string php string to numeric PHP intercept string before

This example describes the insertion of a substring method in a PHP string. Share to everyone for your reference, as follows:

First look at a common online approach:

Method One: String traversal

function Str_insert ($str, $i, $substr) {for ($j =0; $j < $i; $j + +) {$startstr. = $str [$j]; } for ($j = $i; $j
 
  

  
The above method uses the string traversal reorganization to implement the substring insertion function.

  
Then take a look at this site to give an improved method:

  
Method Two: Using SUBSTR function to intercept and combine

  

  
function Str_insert2 ($str, $i, $substr) {//Method two: substr function to intercept  $start =substr ($str, 0, $i);  $end =substr ($str, $i);  $str = ($start. $substr. $end);  return $str;  Return substr ($str, 0, $i). $substr. substr ($str, $i);//The above code can be synthesized into this sentence} $str = "1234567890"; $sstr = "New_word"; Echo str_ Insert2 ($str, 5, $SSTR);//output: 12345new_word67890
  

  
The method uses the SUBSTR function to intercept the string, and then assemble the string to achieve the insertion effect of the substring.

  
Finally, the site to provide you with a most direct way:

  
Method Three: Inserting substrings directly using the Substr_replace function

  

  
Echo Substr_replace ($str, $sstr, 5,0);//Direct output here: 12345new_word67890
  

  
More about PHP related content readers can view the topic: "PHP array" operation Skills Daquan, "PHP Data structure and algorithm tutorial", "PHP Math Skills Summary", "PHP date and Time usage summary", "PHP object-oriented Programming introduction Tutorial", " PHP String Usage Summary, "Getting Started with Php+mysql database operations" and "PHP Common Database Operations Skills Summary"

  
I hope this article is helpful to you in PHP programming.
                                                
  
The above describes the PHP string inserted into the substring method summary of the original, including the string, PHP content, I hope the PHP tutorial interested in a friend helpful.

  
