Question

How to check if a string contains only english letters and digits in PHP

Answer 1

$s = "PHP8";
 
if (!preg_match('/[^A-Za-z0-9]/', $s)) {
    echo "true";
}
else {
    echo "false"; 
}
       
  
   
     
/*
run:
          
true
   
*/

 

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Answer 2

$s = "PHP8תכנות";
  
if (!preg_match('/[^A-Za-z0-9]/', $s)) {
    echo "true";
}
else {
    echo "false"; 
}
        
   
    
      
/*
run:
           
false
    
*/

 

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