PHP - Extraer parte de una cadena

$texto = "<option value=\"1458\" class=\"head\">Opcion</option>";

$value = explode('value=\"',$texto,2);

$value = explode('\"',$value[1]);

$value = $value[0];

echo $value;

$value = explode('value="',$texto,2);

$value = explode('"',$value[1]);

$value = $value[0];

echo $value;

<?php

   $texto = "<option value='1458' class='head'>Opcion</option>";

   $value = explode("value='",$texto,2);

   $value = explode("'",$value[1]);

   $value = $value[0];

   echo $value;

<?php

$string = "<option value=\"1458\" class=\"head\">Opcion</option>";

function extractStr($string, $keyword) {

    $string2 = substr($string, stripos($string, $keyword) + strlen($keyword), strlen($string));

    $return = explode('"', $string2);

    return $return[0];

}

function extractStrRegex($string, $keyword) {

    preg_match("/(?:{$keyword}.\W)(\d+|\w+)/i", $string, $capture);

    return $capture[1];

}

echo extractStr($string, 'value="').'<br>';

echo extractStrRegex($string, 'value');

<?php

function extractStrRegex($string, $keyword) {

    preg_match("/(?:{$keyword}.\W)(\d+|\w+)/i", $string, $capture);

    return $capture[1];

}

echo extractStrRegex($string, 'class');