dyld: Library not loaded: /usr/local/lib/libpng16.16.dylib with anything php related

Question

Using any php application results in:

dyld: Library not loaded: /usr/local/lib/libpng15.15.dylib
Referenced from: /usr/local/bin/php
Reason: image not found
         


        

Answer 1

I had very hard time with this error :

Reason: Incompatible library version: php requires version 44.0.0 or later, but libpng16.16.dylib provides version 42.0.0 Trace/BPT trap: 6

I did all the above things with brew and much more ... but it wasn't this !

Check where your library is :

sudo find / -name libpng16.16.dylib

In my case here was the relevant result :

• /usr/local/lib/libpng16.16.dylib
• /usr/local/Cellar/libpng/1.6.34/lib/libpng16.16.dylib
• /Applications/MAMP/Library/lib/libpng16.16.dylib
• /opt/X11/lib/libpng16.16.dylib

So as I'm a MAMP user it turn out that the error appeared while I was trying to update from PHP 7.1.0 to 7.1.8 (last MAMP php available) as Symfony4 require at least 7.1.3

At the end I instaled the new version of MAMP and it worked (4.1 to 4.2). However be carreful when you're doing this, you need to backup first everything in your MAMP/htdoc folder. Also keep a backup of your custom compiled php version than can live in MAMP/bin/php. (In my case I had a special PHP version with Oracle drivers).

Also if you configured the MAMP php version to be your CLI php interpreter, you'll need to update the PATH in your .bash_profile

It should look something like this :

export PATH=/Applications/MAMP/bin/php/php7.1.8/bin:$PATH

I hope this can help.