replace code in a string

Jeroen_nld

I have a question
When i have a string with text in it and a few pictures
for example something like this:
hello this is a picture < img src......> and this is another picture <im....>

how can i make a function that checks eacht image for its original size and if the size is greater than a predefined size change the size by adding widht=....
this should be done for each image seperatly
I do know how to get the image size with GD but how can i select each img statement in the string and change it ???

Gargouil

to extract img from the string you can use

some string function like strstr(), substr() or something like this
find the string src=" .. then extract image path

Jeroen_nld

yes that is no problem
but how do i rebuild the original string?
if i use a str replace it will change it for all tags..

Gargouil

simply have to keep a backup

$yourvar_ini = $yourvar;

...

work with yourvar and still have original in yourvar_ini

Jeroen_nld

Ahh. i think i get it
make a copy
in the copy just find every img tag
check that tag if it is too large use a eregi_replace with the complet tag to replace just that value..
and so on for every value..

perhaps a good idea to put all img tags i find in an array
check each entry from the array and then walk through the array again if something needs to be changed..
??

Gargouil

yeah not a bad idea

Jeroen_nld

kewl,
i am trying now but i need a last push in the right direction
i am trying now with preg_split to split up a string but it goes wrong
how do i put all these things in an array
let's say i have a string like this:
"something to type <img src=/image.jpg> and blabla <img scr=/image2.jpg> blabla"

???

xblue

I don't think preg_split is what you want. check preg_match_all instead. should be easy to put a pattern together that matches from '<img' to the closing bracket '>' I think?

Jeroen_nld

i think your right.
i will try it with the preg_match_all..
first find a little tutorial to create patterns but thanks for the advice

Jeroen_nld

preg_match_all( '/<img src=.*?>/', $string, $tags );