<?php
$strs = Array("some", "thing", "here");
$poss = Array(1, 2, 3, 4, 5);
$new = Array();
for($i = 0; $i < pow(count($strs), count($poss)); $i++) {
  for($j = 0; $j < count($strs); $j++) {
    $new[$i] = $strs[($i%count($strs))] . " " . $strs[$j];
  }
}
print_r($new);
?>

Array
(
    [0] => some here
    [1] => thing here
    [2] => here here
    [3] => some here
    [4] => thing here
    [5] => here here
    [6] => some here
    [7] => thing here
    [8] => here here
    [9] => some here
    [10] => thing here
    [11] => here here
    [12] => some here
    [13] => thing here
    [14] => here here
    [15] => some here
    [16] => thing here
    [17] => here here
    [18] => some here
    [19] => thing here
    [20] => here here
    [21] => some here
    [22] => thing here
    [23] => here here
    [24] => some here
    [25] => thing here
    [26] => here here
    [27] => some here
    [28] => thing here
    [29] => here here
    [30] => some here
    [31] => thing here
    [32] => here here
    [33] => some here
    [34] => thing here
    [35] => here here
    [36] => some here
    [37] => thing here
    [38] => here here
    [39] => some here
    [40] => thing here
    [41] => here here
    [42] => some here
    [43] => thing here
    [44] => here here
    [45] => some here
    [46] => thing here
    [47] => here here
    [48] => some here
    [49] => thing here
    [50] => here here
    [51] => some here
    [52] => thing here
    [53] => here here
    [54] => some here
    [55] => thing here
    [56] => here here
    [57] => some here
    [58] => thing here
    [59] => here here
    [60] => some here
    [61] => thing here
    [62] => here here
    [63] => some here
    [64] => thing here
    [65] => here here
    [66] => some here
    [67] => thing here
    [68] => here here
    [69] => some here
    [70] => thing here
    [71] => here here
    [72] => some here
    [73] => thing here
    [74] => here here
    [75] => some here
    [76] => thing here
    [77] => here here
    [78] => some here
    [79] => thing here
    [80] => here here
    [81] => some here
    [82] => thing here
    [83] => here here
    [84] => some here
    [85] => thing here
    [86] => here here
    [87] => some here
    [88] => thing here
    [89] => here here
    [90] => some here
    [91] => thing here
    [92] => here here
    [93] => some here
    [94] => thing here
    [95] => here here
    [96] => some here
    [97] => thing here
    [98] => here here
    [99] => some here
    [100] => thing here
    [101] => here here
    [102] => some here
    [103] => thing here
    [104] => here here
    [105] => some here
    [106] => thing here
    [107] => here here
    [108] => some here
    [109] => thing here
    [110] => here here
    [111] => some here
    [112] => thing here
    [113] => here here
    [114] => some here
    [115] => thing here
    [116] => here here
    [117] => some here
    [118] => thing here
    [119] => here here
    [120] => some here
    [121] => thing here
    [122] => here here
    [123] => some here
    [124] => thing here
    [125] => here here
    [126] => some here
    [127] => thing here
    [128] => here here
    [129] => some here
    [130] => thing here
    [131] => here here
    [132] => some here
    [133] => thing here
    [134] => here here
    [135] => some here
    [136] => thing here
    [137] => here here
    [138] => some here
    [139] => thing here
    [140] => here here
    [141] => some here
    [142] => thing here
    [143] => here here
    [144] => some here
    [145] => thing here
    [146] => here here
    [147] => some here
    [148] => thing here
    [149] => here here
    [150] => some here
    [151] => thing here
    [152] => here here
    [153] => some here
    [154] => thing here
    [155] => here here
    [156] => some here
    [157] => thing here
    [158] => here here
    [159] => some here
    [160] => thing here
    [161] => here here
    [162] => some here
    [163] => thing here
    [164] => here here
    [165] => some here
    [166] => thing here
    [167] => here here
    [168] => some here
    [169] => thing here
    [170] => here here
    [171] => some here
    [172] => thing here
    [173] => here here
    [174] => some here
    [175] => thing here
    [176] => here here
    [177] => some here
    [178] => thing here
    [179] => here here
    [180] => some here
    [181] => thing here
    [182] => here here
    [183] => some here
    [184] => thing here
    [185] => here here
    [186] => some here
    [187] => thing here
    [188] => here here
    [189] => some here
    [190] => thing here
    [191] => here here
    [192] => some here
    [193] => thing here
    [194] => here here
    [195] => some here
    [196] => thing here
    [197] => here here
    [198] => some here
    [199] => thing here
    [200] => here here
    [201] => some here
    [202] => thing here
    [203] => here here
    [204] => some here
    [205] => thing here
    [206] => here here
    [207] => some here
    [208] => thing here
    [209] => here here
    [210] => some here
    [211] => thing here
    [212] => here here
    [213] => some here
    [214] => thing here
    [215] => here here
    [216] => some here
    [217] => thing here
    [218] => here here
    [219] => some here
    [220] => thing here
    [221] => here here
    [222] => some here
    [223] => thing here
    [224] => here here
    [225] => some here
    [226] => thing here
    [227] => here here
    [228] => some here
    [229] => thing here
    [230] => here here
    [231] => some here
    [232] => thing here
    [233] => here here
    [234] => some here
    [235] => thing here
    [236] => here here
    [237] => some here
    [238] => thing here
    [239] => here here
    [240] => some here
    [241] => thing here
    [242] => here here
)