add more

Author: BaseMax

array_diff.php

@@ -0,0 +1,31 @@
+<?php
+// array_diff
+
+$array1 = [
+    "red",
+    "blue",
+    "red",
+    "hi",
+    5,
+    1, 2, 3
+];
+$array2 = [
+    "yellow",
+    2, 3, 1,
+    "red",
+    "hi",
+    6-1
+];
+$result = array_diff($array1, $array2);
+
+print_r($array1);
+print_r($array2);
+print_r($result);
+
+// Error:
+// $source = [1, 2, 3, 4];
+// $filter = [3, 4, [5], 6];
+// $result = array_diff($source, $filter);
+// print_r($source);
+// print_r($filter);
+// print_r($result);

asort.php

@@ -0,0 +1,12 @@
+<?php
+// asort
+
+$fruits = [
+    "d" => "lemon",
+    "a" => "orange",
+    "b" => "banana",
+    "c" => "apple"
+];
+print_r($fruits);
+asort($fruits);
+print_r($fruits);

krsort.php

@@ -0,0 +1,12 @@
+<?php
+// krsort
+
+$fruits = [
+    "d" => "lemon",
+    "a" => "orange",
+    "b" => "banana",
+    "c" => "apple"
+];
+print_r($fruits);
+krsort($fruits);
+print_r($fruits);

ksort.php

@@ -0,0 +1,16 @@
+<?php
+// ksort
+
+$fruits = [
+    "d" => "lemon",
+    "a" => "orange",
+    "b" => "banana",
+    "c" => "apple"
+];
+print_r($fruits);
+ksort($fruits);
+print_r($fruits);
+
+ksort($fruits);
+$fruits = array_reverse($fruits);
+print_r($fruits);

max.php

@@ -0,0 +1,20 @@
+<?php
+// max
+
+$numbers = [1, 2, 3, 4, 5];
+var_dump(max($numbers));
+
+// $numbers = [];
+// var_dump(max($numbers));
+
+var_dump(max([1, 2, 3, 4]));
+
+var_dump(
+    max(1, 2, 3, 4)
+);
+
+// Error:
+// var_dump(max([]));
+
+// Error:
+// var_dump(max("hiii"));

rsort.php

@@ -0,0 +1,15 @@
+<?php
+// rsort
+
+$fruits = [
+    "d" => "lemon",
+    "a" => "orange",
+    "b" => "banana",
+    "c" => "apple"
+];
+print_r($fruits);
+sort($fruits);
+print_r($fruits);
+
+rsort($fruits);
+print_r($fruits);

sort.php

@@ -0,0 +1,12 @@
+<?php
+// sort
+$numbers = [];
+$howmany = 20;
+
+for($i=1;$i<=$howmany;$i++) {
+    $numbers[] = rand(1, 100);
+}
+
+print_r($numbers);
+$numbers = sort($numbers);
+print_r($numbers);

ucfirst.php

@@ -0,0 +1,22 @@
+<?php
+// ucfirst
+
+var_dump(ucfirst("hello"));
+
+$str = "hello";
+var_dump(ucfirst($str));
+
+var_dump(ucfirst("hello how are you?"));
+
+var_dump(ucfirst("hello how are you. yoooo!"));
+
+$foo = 'hello world!';
+$foo = ucfirst($foo);             // Hello world!
+var_dump($foo);
+
+$bar = 'HELLO WORLD!';
+$bar = ucfirst($bar);             // HELLO WORLD!
+var_dump($bar);
+$bar = ucfirst(strtolower($bar)); // Hello world!
+var_dump($bar);
+

version_compare.php

@@ -0,0 +1,23 @@
+<?php
+// version_compare
+
+var_dump(PHP_VERSION); // 8.1.6
+
+if (version_compare(PHP_VERSION, '7.0.0') >= 0) {
+    print 'yes';
+} else {
+    print 'no';
+}
+
+if (version_compare('1.3.4', '7.0.0') >= 0) {
+    print 'yes';
+} else {
+    print 'no';
+}
+
+if (version_compare('1.3.4', '7.0.0') < 0) {
+    print 'yes';
+} else {
+    print 'no';
+}
+