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PHP - How to check if a string contains a specific text [duplicate]
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Use the strpos function: http://php.net/manual/en/function.strpos.php
$haystack = "foo bar baz";
$needle = "bar";
if( strpos( $haystack, $needle ) !== false) {
echo "\"bar\" exists in the haystack variable";
}
In your case:
if( strpos( $a, 'some ...
Is the practice of returning a C++ reference variable evil?
...reference is perfectly normal and happens all the time.
If you mean:
int& getInt() {
int i;
return i; // DON'T DO THIS.
}
That is all sorts of evil. The stack-allocated i will go away and you are referring to nothing. This is also evil:
int& getInt() {
int* i = new int;
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Can dplyr package be used for conditional mutating?
...e ifelse
df %>%
mutate(g = ifelse(a == 2 | a == 5 | a == 7 | (a == 1 & b == 4), 2,
ifelse(a == 0 | a == 1 | a == 4 | a == 3 | c == 4, 3, NA)))
Added - if_else: Note that in dplyr 0.5 there is an if_else function defined so an alternative would be to replace ifelse with if_e...
Detect when browser receives file download
...expireCookie( "downloadToken" );
attempts = 30;
}
Example server code (PHP):
$TOKEN = "downloadToken";
// Sets a cookie so that when the download begins the browser can
// unblock the submit button (thus helping to prevent multiple clicks).
// The false parameter allows the cookie to be expose...
Passing base64 encoded strings in URL
...ommend just writing your own helpers. Like these from the comments on the php manual page for base64_encode:
function base64_url_encode($input) {
return strtr(base64_encode($input), '+/=', '._-');
}
function base64_url_decode($input) {
return base64_decode(strtr($input, '._-', '+/='));
}
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Best way to initialize (empty) array in PHP
...creation and instantiation. I wonder whether there are any equivalences in PHP?
8 Answers
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After array_filter(), how can I reset the keys to go in numerical order starting at 0
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The link no longer work, use php.net/manual/en/function.array-values.php instead. I can't update it, as i need to change at least 6 characters.
– Rasmus Hansen
Feb 16 '19 at 15:15
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How to escape single quotes within single quoted strings
...erforming pattern substitution word expansions. Taken from tiswww.case.edu/php/chet/bash/CHANGES. Still works in 4.3.42 but not in 4.3.48.
– stiller_leser
Jul 12 '18 at 12:34
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git diff two files on same branch, same commit
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You don't need git for that, just use diff fileA.php fileB.php (or vimdiff if you want side by side comparison)
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Save classifier to disk in scikit-learn
... objects that can be pickled and dumped like any other. To continue your example:
import cPickle
# save the classifier
with open('my_dumped_classifier.pkl', 'wb') as fid:
cPickle.dump(gnb, fid)
# load it again
with open('my_dumped_classifier.pkl', 'rb') as fid:
gnb_loaded = cPickle.loa...