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A PHP function to test for non alpha-numeric characters in a form field.
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<?php | |
function check_for_non_alpha_numeric($str) { | |
$reg = '/[^[:alnum:]$]/'; | |
preg_match_all($reg, $str, $matches, PREG_SET_ORDER, 0); | |
if($matches) { | |
print "<hr>oops, try again.<pre>"; | |
var_dump($matches); | |
} else { | |
print "good input"; | |
} | |
} | |
// example usage | |
// $test = "5w2thlwrojUbruzedichikEphipre"; | |
// $not_alnum = check_for_non_alpha_numeric($test); | |
// $test = "tesTStriNg%&/(=?aj-hd86b"; | |
// $not_alnum = check_for_non_alpha_numeric($test); |
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Copyright 2018 Hendrik Eduard Kuiper | |
Permission is hereby granted, free of charge, to any person obtaining a | |
copy of this software and associated documentation files (the "Software"), | |
to deal in the Software without restriction, including without limitation | |
the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
and/or sell copies of the Software, and to permit persons to whom the | |
Software is furnished to do so, subject to the following conditions: | |
The above copyright notice and this permission notice shall be included in | |
all copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESSED | |
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
SOFTWARE. |
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