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  1. <?php
  2.  
  3. $string = 'hi ϕllip       it is 900°';
  4.  
  5. $output = preg_replace(array('/( )+/', '/\x{00B0}/u', '/\x{03A6}/u', '/\x{03D5}/u'), array(' ','&deg;','&Phi;','&Phi;'), $string );
  6.  
  7.  
  8.     echo "this is the output:"  . $output;
Success #stdin #stdout 0.01s 20568KB
comments (?)
stdin 
Standard input is empty
stdout 
this is the output:hi &Phi;llip it is 900&deg;
https://ideone.com/qDDsY3
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
secret

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