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PHP Pass by reference in foreach [duplicate]

...); foreach ($a as &$v) { } foreach ($a as $v) { echo $v.'-'.$a[3].PHP_EOL; } As you can see, the last array item takes the current loop value: 'zero', 'one', 'two', and then it's just 'two'... : ) share |...
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PHP常用API函数用法 - 更多技术 - 清泛网 - 专注C/C++及内核技术

PHP常用API函数用法php_common_api_referencePHP常用API函数速查:expload, str_replace, strpos, substr, stripos, strripos, implode, strrpos PHP explode() 函数 把字符串按照指定分隔符分割为数组。 例子: <?php $url = "https://www.tsingfun.com/index.php?m=conten...
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How to check that a string is an int, but not a double, etc.?

... (ctype_digit($testcase)) { echo "The string $testcase consists of all digits.\n"; } else { echo "The string $testcase does not consist of all digits.\n"; } } ?&gt; The above example will output: The string 1820.20 does not consist of all digits. The string 10002 consists...
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Regex lookahead, lookbehind and atomic groups

...ely follow, and stop as backtracking is disabled A non-atomic group will allow backtracking; if subsequent matching ahead fails, it will backtrack and use alternative patterns until a match for the entire expression is found or all possibilities are exhausted. (foo|foot)s applied to foots will: ...
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How can I handle the warning of file_get_contents() function in PHP?

...the warning by putting an error control operator (i.e. @) in front of the call to file_get_contents(): $content = @file_get_contents($site); share | improve this answer | fol...
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py2exe - generate single executable file

... PyInstaller will create a single .exe file with no dependencies; use the --onefile option. It does this by packing all the needed shared libs into the executable, and unpacking them before it runs, just as you describe (EDIT: py2ex...
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PHP Regex to check date is in YYYY-MM-DD format

...ing to be more fuss -- and February 29 cannot be validated with a regex at all. The drawback of this approach is that you have to be very careful to reject all possible "bad" inputs while not emitting a notice under any circumstances. Here's how: explode is limited to return 3 tokens (so that if ...
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PHP cURL HTTP CODE return 0

..., there is nobody to send a code back. Tested using the code below. &lt;?php $html_brand = "www.google.com"; $ch = curl_init(); $options = array( CURLOPT_URL =&gt; $html_brand, CURLOPT_RETURNTRANSFER =&gt; true, CURLOPT_HEADER =&gt; true, CURLOPT_FOLLOWLOCATION...
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Remove multiple whitespaces

I'm getting $row['message'] from a MySQL database and I need to remove all whitespace like \n \t and so on. 15 Answer...
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Writing a new line to file in PHP (line feed)

... Use PHP_EOL which outputs \r\n or \n depending on the OS. share | improve this answer | follow ...