Question

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

Answer 1

$s = "PHPProgramming";

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

 

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Answer 2

$s = "PHPתכנות";

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

 

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Answer 3

$s = "PHPתכנות";

if (ctype_alnum($s)) {
    echo "true";
}
else {
    echo "false"; 
}


    
/*
run:
         
false
  
*/

 

70+ SQL courses for beginners and professionals

Answer 4

$s = "PHP";

if (ctype_alnum($s)) {
    echo "true";
}
else {
    echo "false"; 
}


    
/*
run:
         
true
  
*/

 

70+ SQL courses for beginners and professionals