-1
Problem 1
    - Installation request for kreait/firebase-php 4.35 -> satisfiable by kreait/firebase-php[4.35.0].
    - kreait/firebase-php 4.35.0 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.

You can also run php --ini inside terminal to see which files are used by PHP in CLI mode.

RiggsFolly
  • 93,638
  • 21
  • 103
  • 149
Garuda Putro
  • 1
  • 3
  • 1
    its asking you to install `mbstring`, its a requirement for that package, you have php: ^7.2 ext-ctype ext-json ext-openssl installed but missing ext-mbstring – Lawrence Cherone Apr 12 '20 at 13:18
  • 1
    `the requested PHP extension mbstring is missing from your system.` Suggest you install the mbstring PHP Extension [See here for assist](https://askubuntu.com/questions/491629/how-to-install-php-mbstring-extension-in-ubuntu) – RiggsFolly Apr 12 '20 at 13:19

1 Answers1

0

The error is asking you to install the module mbstring if you are using ubuntu

try this 

sudo apt-get install php-mbstring
Quantumass
  • 826
  • 6
  • 11
  • Problem 1 - mpdf/mpdf v8.0.5 requires ext-gd * -> the requested PHP extension gd is missing from your system. - mpdf/mpdf v8.0.4 requires ext-gd * -> the requested PHP extension gd is missing from your system. - mpdf/mpdf v8.0.3 requires ext-gd * -> the requested PHP extension gd is missing from your system. - mpdf/mpdf v8.0.2 requires ext-gd * -> the requested PHP extension gd is missing from your system. - mpdf/mpdf v8.0.1 requires ext-gd * -> the requested PHP extension gd is missing – Garuda Putro Apr 12 '20 at 14:03
  • install ext-gd module like that `sudo apt-get install php-gd` – Quantumass Apr 12 '20 at 14:05
  • can you please choose this answer as the right answer – Quantumass Apr 12 '20 at 14:42