Fangversuch
Warning: Use of undefined constant ri_rand_compare - assumed 'ri_rand_compare' (this will throw an Error in a future version of PHP) in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/random-image-widget/random_image.php on line 129 Warning: Use of undefined constant ri_rand_compare - assumed 'ri_rand_compare' (this will throw an Error in a future version of PHP) in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/random-image-widget/random_image.php on line 130 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 1384 Warning: preg_match_all(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 700 Warning: Invalid argument supplied for foreach() in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 707 Warning: preg_match_all(): Compilation failed: invalid range in character class at offset 4 in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 700 Warning: Invalid argument supplied for foreach() in /home/httpd/vhosts/scratchbook.ch/httpdocs/wp-content/plugins/lightbox-plus/classes/shd.class.php on line 707
Hab‘ endlich begriffen, was der Sinn von „try-catch“-Konstrukten ist.
iWillFail(); iAmClean(); |
Wenn es tschätteret bei der iWillFail()-Funktion, dann kommt ein Fehler, das Programm stürzt ab. Mir egal, dachte ich früher; wenn ein Fehler passiert, dann passiert eben ein Fehler – ob ich den jetzt noch Abfange ist doch egal… Es brätscht so oder so.
Nun – nicht ganz 🙂
Bei obigem Code rumplet es, ja. Und das Programm stürzt ab, genau.
iAmClean() wird nicht mehr ausgeführt.
try { iWillFail(); } catch(e) {} iAmClean(); |
Hier wird das iWillFail() abgefangen. Es brätscht. „Hmm, dehaut“, sagt sich das Programm und läuft weiter…
iAmClean() wird ausgeführt.
😉
Nützlich bei externen Programmen wie z.B. Tracking-Skripts, wo man nie genau weiss, ob die gut laufen oder nicht. Falls nicht, läuft wenigstens der Rest weiter und es reisst nicht gleich das ganze Programm in den Abgrund…
noelboss
Coolius Claude 🙂