PHP检查字符串的任何部分是否存在数组元素

Question

I know how to find if your string equals an array value:

$colors = array("blue","red","white");

$string = "white";

if (!in_array($string, $colors)) {
    echo 'not found';
}

...but how do I find if the string CONTAINS any part of the array values?

$colors = array("blue","red","white");

$string = "whitewash"; // I want this to be found in the array

if (!in_array($string, $colors)) {
    echo 'not found';
}

Answer 1

Just loop the array containing the values, and check if they are found in the input string, using strpos

$colors = array("blue","red","white");

$string = "whitewash"; // I want this to be found in the array

foreach ( $colors as $c ) {

    if ( strpos ( $string , $c ) !== FALSE ) {

         echo "found"; 

    }
}

You can wrap it in a function:

function findString($array, $string) {

    foreach ( $array as $a ) {

        if ( strpos ( $string , $a ) !== FALSE )
             return true;

    }

    return false;
} 

var_dump( findString ( $colors , "whitewash" ) ); // TRUE