php sub list
function sortByAge($a, $b) {
return $a['age'] > $b['age'];
}
$people=[
["age"=>54,"first_name"=>"Bob","last_name"=>"Dillion"],
["age"=>22,"first_name"=>"Sarah","last_name"=>"Harvard"],
["age"=>31,"first_name"=>"Chuck","last_name"=>"Bartowski"]
];
usort($people, 'sortByAge'); //$people is now sorted by age (ascending)php sub list
substr ( $string , $start , $length );
/**Returns the extracted part of string;
*or FALSE on failure, or an empty string
*/php sub list
const str = 'substr';
console.log(str.substr(1, 2)); // (1, 2): ub
console.log(str.substr(1)); // (1): ubstr
/* Percorrendo de trás para frente */
console.log(str.substr(-3, 2)); // (-3, 2): st
console.log(str.substr(-3)); // (-3): strphp sub list
<?php
$str = "Africa Beautiful!";
echo substr($str, 0, 6); // Outputs: Africa
echo substr($str, 0, -10); // Outputs: Beautiful
echo substr($str, 0); // Outputs: Africa Beautiful!
?>php sub list
array_slice() function is used to get selected part of an array.
Syntax:
array_slice(array, start, length, preserve)
*preserve = false (default)
If we put preserve=true then the key of value are same as original array.
Example (without preserve):
<?php
$a=array("red","green","blue","yellow","brown");
print_r(array_slice($a,1,2));
?>
Output:
Array ( [0] => green [1] => blue )
Example (with preserve):
<?php
$a=array("red","green","blue","yellow","brown");
print_r(array_slice($a,1,2,true));
?>
Output:
Array ( [1] => green [2] => blue )Copyright © 2021 Codeinu
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