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  • codeigniter vs laravel php framework
    codeigniter vs laravel php framework
    Laravel is suitable for medium and large projects, with comprehensive functions and rich ecology, and is suitable for long-term maintenance; CodeIgniter is suitable for small projects, with light weight and flexible, and has a low learning threshold. 1. CodeIgniter is easy to get started, suitable for beginners and short-cycle projects; Laravel has many functions but a steep learning curve, suitable for complex systems. 2. CodeIgniter has better performance, and Laravel can improve performance through caching, which is suitable for advanced functional needs. 3. Laravel is active in the community, with many expansion packages, and problem solving is faster; CodeIgniter is suitable for independent development. 4. Laravel built-in security mechanism is perfect, has good maintenance, and has clear version updates; CodeIgniter requires more manual protection
    PHP Tutorial . Backend Development 301 2025-07-03 10:12:12
  • php regex check if string contains a word
    php regex check if string contains a word
    To determine whether a string contains a complete word, using the preg_match() function with regular expressions is an effective method. 1. Use \b to represent word boundaries to ensure that the matching of the complete word rather than a substring. For example, /\bcat\b/ can avoid matching to category or scat; 2. Add the i flag to implement ignoring case searches, such as /\bapple\b/i can match Apple, APPLE and other different formats; 3. Use | and brackets to realize the "or" relationship search of multiple words, such as /\b(apple|banana|orange)\b/ can be used for keyword filtering or highlighting; 4. Pay attention to common problems: do not miss \b, deal with Chinese spaces and escape special characters, p can be used.
    PHP Tutorial . Backend Development 414 2025-07-03 10:07:11
  • Best way to loop large php array?
    Best way to loop large php array?
    Use foreach loops to process large PHP arrays most efficiently, avoiding reoperations within the loop; use generators to read them line by line on super-large data sets; free memory in time and optimize array structure. 1. Priority is given to foreach, which is concise and optimized, and do not use references unless necessary; 2. Avoid high-frequency database operations or complex calculations in the loop; 3. Use generator streaming to process extremely large data; 4. Use unset to free memory in time; 5. Avoid repeated calls to count() to cache in advance; 6. Select the traversal method according to the array structure, if only keys or values ??are needed, use array_keys or array_values ??but pay attention to memory overhead.
    PHP Tutorial . Backend Development 279 2025-07-03 02:38:40
  • Difference between?array_merge?and? ?in php?
    Difference between?array_merge?and? ?in php?
    InPHP,thekeydifferencebetweenarray_merge()andthe operatorliesinhowtheyhandleduplicatekeysandreindexing.1)Withnumerickeys,array_merge()reindexesstartingfrom0,while preservesoriginalkeysandignoresduplicatesfromthesecondarray.2)Forstringkeys,array_merge
    PHP Tutorial . Backend Development 930 2025-07-03 02:16:40
  • How to use php exit function?
    How to use php exit function?
    exit() is a function in PHP that is used to terminate script execution immediately. Common uses include: 1. Terminate the script in advance when an exception is detected, such as the file does not exist or verification fails; 2. Output intermediate results during debugging and stop execution; 3. Call exit() after redirecting in conjunction with header() to prevent subsequent code execution; In addition, exit() can accept string parameters as output content or integers as status code, and its alias is die().
    PHP Tutorial . Backend Development 892 2025-07-03 02:15:30
  • How to add element to php array?
    How to add element to php array?
    There are many ways to add elements to arrays in PHP, and different methods can be selected according to different needs. 1. Add elements to the end of the array: You can use the [] operator or array_push() function. The two have the same effect, but [] is more concise; 2. Insert elements at the beginning of the array: Use the array_unshift() function, which will re-index the array key; 3. Insert elements to the specified position: Implemented through array_splice(), which is flexible but pay attention to the indexing out-of-bounds issue; 4. Merge multiple arrays: Use array_merge(), which is suitable for merging two or more arrays. If it is an associative array, the subsequent key of the same name will be overwritten. Commonly used are [] and array_merge(
    PHP Tutorial . Backend Development 934 2025-07-03 01:54:41
  • How to use php round function?
    How to use php round function?
    PHP's round() function is used to round floating point numbers. The basic usage is to pass in a floating point number, and the integer is rounded by rounding by default; 1. The reserved decimal places can be controlled through the second parameter precision, such as round(3.14159, 2) output 3.14; 2. When precision is negative, carry to the left, such as round(1234.56,-2) output 1200; 3. The third parameter mode can specify the rounding method, and the default PHP_ROUND_HALF_UP is rounded, and PHP_ROUND_HALF_DOWN does not carry. 5; in addition, it is necessary to note that floating point accuracy issues may lead to unexpected results. It is recommended to combine number_fo
    PHP Tutorial . Backend Development 925 2025-07-02 17:25:11
  • How to get last element of php array
    How to get last element of php array
    There are the following methods to get the last element of the PHP array: 1. The most direct way to use the end() function, but it will move the internal pointer of the array; 2. Combining array_keys() and count() is suitable for arrays with discontinuous key names; 3. For continuous numeric index arrays, $array[count($array)-1] can be used; 4. Array_pop() will modify the original array, be careful to use it for read-only operations. The selection method should be determined based on the array type and whether the original array and pointer state are allowed to be modified.
    PHP Tutorial . Backend Development 570 2025-07-02 17:23:11
  • How to combine two php arrays unique values?
    How to combine two php arrays unique values?
    To merge two PHP arrays and keep unique values, there are two main methods. 1. For index arrays or only deduplication, use array_merge and array_unique combinations: first merge array_merge($array1,$array2) and then use array_unique() to deduplicate them to finally get a new array containing all unique values; 2. For associative arrays and want to retain key-value pairs in the first array, use the operator: $result=$array1 $array2, which will ensure that the keys in the first array will not be overwritten by the second array. These two methods are applicable to different scenarios, depending on whether the key name is retained or only the focus is on
    PHP Tutorial . Backend Development 1096 2025-07-02 17:18:13
  • How to shuffle a php array?
    How to shuffle a php array?
    To disrupt the order of PHP arrays, 1. Use the shuffle() function to randomly disrupt the element order and discard the original key name; 2. If you need to retain the key name, you can use array_rand() to rebuild the array with loop; 3. For multi-dimensional arrays, you can still use shuffle() to process the top-level elements, or combine usort() with random comparison functions to implement more complex sorting logic. These methods can be selected and used according to specific needs.
    PHP Tutorial . Backend Development 376 2025-07-02 17:09:30
  • How to convert php array to string?
    How to convert php array to string?
    To convert PHP arrays into strings, the most common method is to use the implode() function 1.implode() accepts connectors and arrays as parameters, and concatenates array elements into strings with specified characters; 2. For multi-dimensional arrays, they must be "flattened" into one-dimensional arrays through array_column() or recursively before converting; 3. To preserve the key-value pair relationship, you can use http_build_query() to generate a string in the form of URL query parameters; in addition, before processing, you should ensure that the array elements are of string type, and if necessary, you can use array_map('strval',$array) to convert.
    PHP Tutorial . Backend Development 817 2025-07-02 17:02:10
  • How to create an array in php?
    How to create an array in php?
    There are two ways to create an array in PHP: use the array() function or use brackets []. 1. Using the array() function is a traditional way, with good compatibility. Define index arrays such as $fruits=array("apple","banana","orange"), and associative arrays such as $user=array("name"=>"John","age"=>25); 2. Using [] is a simpler way to support since PHP5.4, such as $color
    PHP Tutorial . Backend Development 306 2025-07-02 17:01:10
  • php raw post data php
    php raw post data php
    The way to process raw POST data in PHP is to use $rawData=file_get_contents('php://input'), which is suitable for receiving JSON, XML, or other custom format data. 1.php://input is a read-only stream, which is only valid in POST requests; 2. Common problems include server configuration or middleware reading input streams, which makes it impossible to obtain data; 3. Application scenarios include receiving front-end fetch requests, third-party service callbacks, and building RESTfulAPIs; 4. The difference from $_POST is that $_POST automatically parses standard form data, while the original data is suitable for non-standard formats and allows manual parsing; 5. Ordinary HTM
    PHP Tutorial . Backend Development 577 2025-07-02 16:51:11
  • How to convert json string to php array?
    How to convert json string to php array?
    Use the json_decode function and set the second parameter to true to convert the JSON string to PHP array; 1. The usage is $array=json_decode($jsonString,true); 2. If the second parameter is not added, the stdClass object will be returned; 3. Make sure that the input string is valid JSON, otherwise it will return null; 4. You can check errors through json_last_error(); 5. Common errors include format problems such as unclosed quotes, redundant commas, etc.; 6. After the conversion in the example, you can access the corresponding value through the array key; as long as you pay attention to the format and parameter settings, the conversion can be completed smoothly.
    PHP Tutorial . Backend Development 422 2025-07-02 16:48:41

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