Question

How to check if a characters exist in a string with PHP

Answer 1

$s = "php programming"; 
        
echo strpos($s, 'o') . "<br />";

if (strpos($s, 'x') === false) {
    echo "false" . "<br />";
}

if (strpos($s, 'x') !== false) {
    echo "exist";
}
else {
    echo "not exist";
}


    
/*
run:

6
false
not exist
         
*/

 

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Answer 2

$s = "php programming"; 
        
echo strstr($s, 'o') . "<br />";

if (strstr($s, 'x') === false) {
    echo "false" . "<br />";
}

if (strstr($s, 'w') !== false) {
    echo "exist";
}
else {
    echo "not exist";
}


    
/*
run:

ogramming
false
not exist
         
*/

 

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Answer 3

$s = "php programming"; 
        
echo stristr($s, 'G') . "<br />"; // Case-insensitive strstr

if (stristr($s, 'Z') === false) {
    echo "false" . "<br />";
}

if (stristr($s, 'L') !== false) {
    echo "exist";
}
else {
    echo "not exist";
}


    
/*
run:

gramming
false
not exist
         
*/

 

70+ SQL courses for beginners and professionals