<?php
function closest($array, $number) {
    sort($array);
    foreach ($array as $a) {
       if ((int) $a > $number) return $a;
    }
    return end($array);
}
 
$array = array('0730','0750','0810','0830','0840','0850','0900','0910','0920','0930','0940','0950',1000,1010,1020,1030,1040,1050,1100,1110,1120,1130,1140,1150,1210,1230,1250,1310,1330,1350,1410,1430,1450,1510,1530,1550,1610,1630,1650,1710,1720,1730,1740,1750,1800,1810,1820,1830,1840,1850,1900,1910,1920,1930,1940,1950,2000,2010,2020,2030,2040,2050,2100,2120,2140,2200,2220,2240,2300,2320);
 
$nexttime = closest($array, '0930');
echo $nexttime;

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