I have this simple line of php
$text = preg_replace("/\ii(.*?)\<>/", "<img scr='img/$1'>", $text);
Where I change II30.jpgII to <img scr='img/30.jpg'>, and it works fine.
But what I need, is to also check if there is a file called 30.txt, and if so, print the text below the image. I simply can’t figure out how do do that – maybe I’m all wrong using preg_replace anyway?
What I acually need is a way to change <img>30.jpg<img> to <img scr='img/30.jpg'>, but I could not figure out how to search for <img> so ended up using II instead 🙂
And then call a function image_text_print("img/30.txt"), if the file exists, insert the return just below the image.
It not so well explained, but I hope you understand what I look for 🙂
Edit
Instead maybe I should somehow search the $text for xxxxx, and then
- check for file xxxxx.txt
- read the file xxxxx.txt file
- make the changes in $text to
- (text from xxxxx.txt file)
But I can’t figure out how to search for content between multiple and , in $text :-/
Jorgensen
10
This is my proposed solution using preg_match_all instead of preg_replace or preg_replace_callback. I have made a couple of assumptions: 1) The images are always digits followed by dot jpg, and 2) There may be other text in between the images. I’m sure you can adjust those as required.
//sample text to search and replace on
$text = 'Some other text <img>30.jpg<img> something in between <img>50.jpg<img> something else <img>40.jpg<img>';
//initialize an array to hold the matches
$matches = [];
//this is here to mock up the function you said you needed to call
//this code simply fetches the file contents
function image_text_print($filename)
{
return file_get_contents($filename);
}
//find all matches of <img>30.jpg<img> where 30 can be any number made up of 1 or more digits (adjust the regex to your requirements)
if(preg_match_all('#\<img>(d+).jpg\<img>#', $text,$matches))
{
//preg_match_all gives us 2 arrays, one with the matched text and one with the image numbers
foreach($matches[0] as $matchInd=>$matchText)
{
//build up the replacement text
$replacement = '<img scr="img/'.$matches[1][$matchInd].'.jpg">';
//create the filename and then check if it exists
$filename = 'img/'.$matches[1][$matchInd].'.txt';
if(is_file($filename))
{
//if the file exists call your function and append results
$replacement .= image_text_print($filename);
}
//finally replace the matched text
$text = str_replace($matchText,$replacement,$text);
}
}
1