Files

001-first-example.php
002-arithmetic-operators-in-php.php
003-variables-and-data-types.php
004-how-the-php-compiler-works.php
005-working-with-strings.php
006-operator-precedence-in-php.php
007-adding-comments-in-php.php
008-introduction-to-arrays.php
009-associative-arrays-with-keys-and-values.php
010-integrating-php-with-html.php
011-receive-php-information.php
011-send-php-information.php
012-adding-if-else-conditionals.php
013-implementing-comparison-operators.php
014-exploring-logical-operators.php
015-enhancing-else-if-and-ternary.php
016-introducing-while-loops.php
017-adding-examples-for-loops.php
018-working-with-foreach-loops.php
019-handling-get-requests.php
019-planet.php
019-planets.php
020-handling-post-requests.php
020-receive-form.php
021-defining-and-using-functions.php
022-receive-form.php
022-validating-inputs-and-escaping.php
023-receive-form.php
023-server.php
023-understanding-server-request.php
024-array-compact-is_array-in_array.php
025-array-array_keys-array_values-count-array_merge.php
026-arrays-array_pop-array_shift-unset-array_push-unshift-array_unique.php
027-arrays-arsort-rsort-asort-sort.php
028-arrays-reset-end-array_filter-array_map.php
029-string-strtoupper-strtolower-ucfirst-ucwords.php
030-string-explode-implode.php
031-string-ltrim-rtrim-trim.php
032-string-str_replace-substr-strlen.php
033-string-isset-unset.php
034-string-date.php
035-footer.php
035-header.php
035-include-include_once-require-require_once.php
036-reading-my-cookie.php
036-working-with-cookies.php
037-creating-sessions.php
038-manipulating-session-data.php
038-other-page.php
039-basic-login-example.php
039-login.php
039-logout.php
040-login.php
040-logout.php
040-session-configuration-and-security.php
040-session_start.php
README-pt-br.md
README.md

033-string-isset-unset.php

antonio-phpfullstack

033-Managing strings with isset and unset in PHP

Jan 6, 2025

a4f49b2 · Jan 6, 2025