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<title>Programming &amp; Software Q&amp;A | CollectiveSolver - Recent questions tagged php</title>
<link>https://collectivesolver.com/tag/php</link>
<description>Powered by Question2Answer</description>
<item>
<title>How to create a list of random file names, including extension, dates, and file size in PHP</title>
<link>https://collectivesolver.com/97412/how-to-create-a-list-of-random-file-names-including-extension-dates-and-file-size-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97412/how-to-create-a-list-of-random-file-names-including-extension-dates-and-file-size-in-php</guid>
<pubDate>Sat, 16 May 2026 08:30:33 +0000</pubDate>
</item>
<item>
<title>How to create a list of random dates in PHP</title>
<link>https://collectivesolver.com/97379/how-to-create-a-list-of-random-dates-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97379/how-to-create-a-list-of-random-dates-in-php</guid>
<pubDate>Fri, 15 May 2026 18:32:55 +0000</pubDate>
</item>
<item>
<title>How to compress and decompress repeated string characters by storing the repeated length (RLE) in PHP</title>
<link>https://collectivesolver.com/97329/how-to-compress-and-decompress-repeated-string-characters-by-storing-the-repeated-length-rle-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97329/how-to-compress-and-decompress-repeated-string-characters-by-storing-the-repeated-length-rle-in-php</guid>
<pubDate>Thu, 14 May 2026 07:39:41 +0000</pubDate>
</item>
<item>
<title>How to calculate the 100th term of the sequence 8, 64, 80, 136, 152 in PHP</title>
<link>https://collectivesolver.com/97271/how-to-calculate-the-100th-term-of-the-sequence-8-64-80-136-152-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97271/how-to-calculate-the-100th-term-of-the-sequence-8-64-80-136-152-in-php</guid>
<pubDate>Tue, 12 May 2026 05:36:02 +0000</pubDate>
</item>
<item>
<title>How to convert an array of multi‑digit numbers to a number in PHP</title>
<link>https://collectivesolver.com/97231/how-to-convert-an-array-of-multi-digit-numbers-to-a-number-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97231/how-to-convert-an-array-of-multi-digit-numbers-to-a-number-in-php</guid>
<pubDate>Mon, 11 May 2026 09:34:13 +0000</pubDate>
</item>
<item>
<title>How to get accurate ticks from a timer (high‑resolution timer) in PHP</title>
<link>https://collectivesolver.com/97153/how-to-get-accurate-ticks-from-a-timer-high-resolution-timer-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97153/how-to-get-accurate-ticks-from-a-timer-high-resolution-timer-in-php</guid>
<pubDate>Sat, 09 May 2026 08:49:35 +0000</pubDate>
</item>
<item>
<title>How to calculate the CRC32 of a string in PHP</title>
<link>https://collectivesolver.com/97127/how-to-calculate-the-crc32-of-a-string-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97127/how-to-calculate-the-crc32-of-a-string-in-php</guid>
<pubDate>Fri, 08 May 2026 14:32:11 +0000</pubDate>
</item>
<item>
<title>How to create a sorted unique array from a matrix in PHP</title>
<link>https://collectivesolver.com/97080/how-to-create-a-sorted-unique-array-from-a-matrix-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97080/how-to-create-a-sorted-unique-array-from-a-matrix-in-php</guid>
<pubDate>Thu, 07 May 2026 05:58:50 +0000</pubDate>
</item>
<item>
<title>How to create a common sorted unique array from 3 integer arrays in PHP</title>
<link>https://collectivesolver.com/97048/how-to-create-a-common-sorted-unique-array-from-3-integer-arrays-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97048/how-to-create-a-common-sorted-unique-array-from-3-integer-arrays-in-php</guid>
<pubDate>Wed, 06 May 2026 08:54:23 +0000</pubDate>
</item>
<item>
<title>How to convert an integer into its written‑out English words in PHP</title>
<link>https://collectivesolver.com/97008/how-to-convert-an-integer-into-its-written-out-english-words-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/97008/how-to-convert-an-integer-into-its-written-out-english-words-in-php</guid>
<pubDate>Tue, 05 May 2026 07:02:36 +0000</pubDate>
</item>
<item>
<title>How to calculate all the less than 500 additive prime numbers in PHP</title>
<link>https://collectivesolver.com/96976/how-to-calculate-all-the-less-than-500-additive-prime-numbers-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96976/how-to-calculate-all-the-less-than-500-additive-prime-numbers-in-php</guid>
<pubDate>Mon, 04 May 2026 15:22:46 +0000</pubDate>
</item>
<item>
<title>How to define a terabyte constant in PHP</title>
<link>https://collectivesolver.com/96944/how-to-define-a-terabyte-constant-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96944/how-to-define-a-terabyte-constant-in-php</guid>
<pubDate>Sun, 03 May 2026 13:21:01 +0000</pubDate>
</item>
<item>
<title>How to define an exabyte constant in PHP</title>
<link>https://collectivesolver.com/96912/how-to-define-an-exabyte-constant-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96912/how-to-define-an-exabyte-constant-in-php</guid>
<pubDate>Sun, 03 May 2026 08:05:42 +0000</pubDate>
</item>
<item>
<title>How to define a petabyte constant in PHP</title>
<link>https://collectivesolver.com/96882/how-to-define-a-petabyte-constant-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96882/how-to-define-a-petabyte-constant-in-php</guid>
<pubDate>Sun, 03 May 2026 05:30:42 +0000</pubDate>
</item>
<item>
<title>How to hash a string with SHA-256 in PHP</title>
<link>https://collectivesolver.com/96825/how-to-hash-a-string-with-sha-256-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96825/how-to-hash-a-string-with-sha-256-in-php</guid>
<pubDate>Fri, 01 May 2026 16:45:32 +0000</pubDate>
</item>
<item>
<title>How to use math functions and constants in PHP</title>
<link>https://collectivesolver.com/96765/how-to-use-math-functions-and-constants-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96765/how-to-use-math-functions-and-constants-in-php</guid>
<pubDate>Thu, 30 Apr 2026 14:12:55 +0000</pubDate>
</item>
<item>
<title>How to create a function with an optional parameter in PHP</title>
<link>https://collectivesolver.com/96682/how-to-create-a-function-with-an-optional-parameter-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96682/how-to-create-a-function-with-an-optional-parameter-in-php</guid>
<pubDate>Wed, 29 Apr 2026 07:31:43 +0000</pubDate>
</item>
<item>
<title>How to decode Leet Speak (where numbers resemble letters (7-&gt;T, 1-&gt;I, 5-&gt;S, 3 -&gt; E)) in PHP</title>
<link>https://collectivesolver.com/96619/how-to-decode-leet-speak-where-numbers-resemble-letters-7-t-1-i-5-s-3-e-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96619/how-to-decode-leet-speak-where-numbers-resemble-letters-7-t-1-i-5-s-3-e-in-php</guid>
<pubDate>Mon, 27 Apr 2026 09:59:59 +0000</pubDate>
</item>
<item>
<title>How to express a decimal number as a fixed-length string with leading zeros in PHP</title>
<link>https://collectivesolver.com/96560/how-to-express-a-decimal-number-as-a-fixed-length-string-with-leading-zeros-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96560/how-to-express-a-decimal-number-as-a-fixed-length-string-with-leading-zeros-in-php</guid>
<pubDate>Sun, 26 Apr 2026 13:48:59 +0000</pubDate>
</item>
<item>
<title>How to reconstruct a full sparse matrix from a compact (triplet) matrix in PHP</title>
<link>https://collectivesolver.com/96545/how-to-reconstruct-a-full-sparse-matrix-from-a-compact-triplet-matrix-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96545/how-to-reconstruct-a-full-sparse-matrix-from-a-compact-triplet-matrix-in-php</guid>
<pubDate>Sun, 26 Apr 2026 07:53:34 +0000</pubDate>
</item>
<item>
<title>How to create an enumeration of constants with and without explicit values in PHP</title>
<link>https://collectivesolver.com/96532/how-to-create-an-enumeration-of-constants-with-and-without-explicit-values-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96532/how-to-create-an-enumeration-of-constants-with-and-without-explicit-values-in-php</guid>
<pubDate>Sat, 25 Apr 2026 19:30:34 +0000</pubDate>
</item>
<item>
<title>How to compact a sparse matrix in PHP</title>
<link>https://collectivesolver.com/96472/how-to-compact-a-sparse-matrix-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96472/how-to-compact-a-sparse-matrix-in-php</guid>
<pubDate>Fri, 24 Apr 2026 07:57:01 +0000</pubDate>
</item>
<item>
<title>How to check if a given matrix is a sparse matrix (contains a large number of zeros) in PHP</title>
<link>https://collectivesolver.com/96456/how-to-check-if-a-given-matrix-is-a-sparse-matrix-contains-a-large-number-of-zeros-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96456/how-to-check-if-a-given-matrix-is-a-sparse-matrix-contains-a-large-number-of-zeros-in-php</guid>
<pubDate>Thu, 23 Apr 2026 14:33:52 +0000</pubDate>
</item>
<item>
<title>How to search for a word in a grid of characters with PHP</title>
<link>https://collectivesolver.com/96436/how-to-search-for-a-word-in-a-grid-of-characters-with-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96436/how-to-search-for-a-word-in-a-grid-of-characters-with-php</guid>
<pubDate>Thu, 23 Apr 2026 07:39:40 +0000</pubDate>
</item>
<item>
<title>How to create a generic‑like method in PHP</title>
<link>https://collectivesolver.com/96384/how-to-create-a-generic-like-method-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96384/how-to-create-a-generic-like-method-in-php</guid>
<pubDate>Wed, 22 Apr 2026 06:01:14 +0000</pubDate>
</item>
<item>
<title>How to localize date format in PHP</title>
<link>https://collectivesolver.com/96315/how-to-localize-date-format-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96315/how-to-localize-date-format-in-php</guid>
<pubDate>Sun, 19 Apr 2026 09:26:15 +0000</pubDate>
</item>
<item>
<title>How to create a tag cloud by wrapping array values in h1 through h6 tags in PHP</title>
<link>https://collectivesolver.com/96291/how-to-create-a-tag-cloud-by-wrapping-array-values-in-h1-through-h6-tags-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96291/how-to-create-a-tag-cloud-by-wrapping-array-values-in-h1-through-h6-tags-in-php</guid>
<pubDate>Sat, 18 Apr 2026 16:31:28 +0000</pubDate>
</item>
<item>
<title>How to get the number of days needed to wait after a day (a[i]) gets warmer given an array of temperatures in PHP</title>
<link>https://collectivesolver.com/96271/how-to-get-the-number-of-days-needed-to-wait-after-a-day-a-i-gets-warmer-given-an-array-of-temperatures-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96271/how-to-get-the-number-of-days-needed-to-wait-after-a-day-a-i-gets-warmer-given-an-array-of-temperatures-in-php</guid>
<pubDate>Sat, 18 Apr 2026 09:33:02 +0000</pubDate>
</item>
<item>
<title>How to rehash a password in PHP</title>
<link>https://collectivesolver.com/96257/how-to-rehash-a-password-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96257/how-to-rehash-a-password-in-php</guid>
<pubDate>Sat, 18 Apr 2026 08:21:12 +0000</pubDate>
</item>
<item>
<title>How to verify a hashed password in PHP</title>
<link>https://collectivesolver.com/96255/how-to-verify-a-hashed-password-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96255/how-to-verify-a-hashed-password-in-php</guid>
<pubDate>Sat, 18 Apr 2026 06:46:21 +0000</pubDate>
</item>
<item>
<title>How to hash a password in PHP</title>
<link>https://collectivesolver.com/96253/how-to-hash-a-password-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96253/how-to-hash-a-password-in-php</guid>
<pubDate>Sat, 18 Apr 2026 06:38:02 +0000</pubDate>
</item>
<item>
<title>How to check if a string is title case in PHP</title>
<link>https://collectivesolver.com/96230/how-to-check-if-a-string-is-title-case-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96230/how-to-check-if-a-string-is-title-case-in-php</guid>
<pubDate>Fri, 17 Apr 2026 14:19:25 +0000</pubDate>
</item>
<item>
<title>How to copy a string using multibyte-safe fin PHP</title>
<link>https://collectivesolver.com/96129/how-to-copy-a-string-using-multibyte-safe-fin-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96129/how-to-copy-a-string-using-multibyte-safe-fin-php</guid>
<pubDate>Thu, 16 Apr 2026 14:07:06 +0000</pubDate>
</item>
<item>
<title>How to copy a string in PHP</title>
<link>https://collectivesolver.com/96121/how-to-copy-a-string-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96121/how-to-copy-a-string-in-php</guid>
<pubDate>Thu, 16 Apr 2026 13:55:44 +0000</pubDate>
</item>
<item>
<title>How to represent the Boolean &quot;true&quot; and &quot;false&quot; in PHP</title>
<link>https://collectivesolver.com/96019/how-to-represent-the-boolean-true-and-false-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/96019/how-to-represent-the-boolean-true-and-false-in-php</guid>
<pubDate>Tue, 14 Apr 2026 15:26:33 +0000</pubDate>
</item>
<item>
<title>How to calculate relative past time from a given date &amp; time (e.g., 3 hours ago, 5 days ago, a month ago) in PHP</title>
<link>https://collectivesolver.com/95962/how-to-calculate-relative-past-time-from-a-given-date-%26-time-e-g-3-hours-ago-5-days-ago-a-month-ago-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95962/how-to-calculate-relative-past-time-from-a-given-date-%26-time-e-g-3-hours-ago-5-days-ago-a-month-ago-in-php</guid>
<pubDate>Mon, 13 Apr 2026 09:59:04 +0000</pubDate>
</item>
<item>
<title>How to create an infinite loop in PHP</title>
<link>https://collectivesolver.com/95875/how-to-create-an-infinite-loop-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95875/how-to-create-an-infinite-loop-in-php</guid>
<pubDate>Sat, 11 Apr 2026 06:19:05 +0000</pubDate>
</item>
<item>
<title>How to add a new interval into a sorted array of non‑overlapping intervals in PHP</title>
<link>https://collectivesolver.com/95810/how-to-add-a-new-interval-into-a-sorted-array-of-non-overlapping-intervals-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95810/how-to-add-a-new-interval-into-a-sorted-array-of-non-overlapping-intervals-in-php</guid>
<pubDate>Thu, 09 Apr 2026 13:26:57 +0000</pubDate>
</item>
<item>
<title>How to print text diagonally from left to right recursively in PHP</title>
<link>https://collectivesolver.com/95772/how-to-print-text-diagonally-from-left-to-right-recursively-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95772/how-to-print-text-diagonally-from-left-to-right-recursively-in-php</guid>
<pubDate>Wed, 08 Apr 2026 16:12:59 +0000</pubDate>
</item>
<item>
<title>How to detect whether any intervals overlap in a list of start and end times with PHP</title>
<link>https://collectivesolver.com/95752/how-to-detect-whether-any-intervals-overlap-in-a-list-of-start-and-end-times-with-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95752/how-to-detect-whether-any-intervals-overlap-in-a-list-of-start-and-end-times-with-php</guid>
<pubDate>Wed, 08 Apr 2026 09:50:12 +0000</pubDate>
</item>
<item>
<title>How to find the k biggest values from an array in PHP</title>
<link>https://collectivesolver.com/95679/how-to-find-the-k-biggest-values-from-an-array-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95679/how-to-find-the-k-biggest-values-from-an-array-in-php</guid>
<pubDate>Mon, 06 Apr 2026 08:58:56 +0000</pubDate>
</item>
<item>
<title>How to find the maximum value we can achieve by picking k elements from an array in PHP</title>
<link>https://collectivesolver.com/95677/how-to-find-the-maximum-value-we-can-achieve-by-picking-k-elements-from-an-array-in-php</link>
<description></description>
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<pubDate>Mon, 06 Apr 2026 08:56:24 +0000</pubDate>
</item>
<item>
<title>How to check whether only 2 bits in a number at a specific position are on (edge‑case‑safe) with PHP</title>
<link>https://collectivesolver.com/95598/how-to-check-whether-only-2-bits-in-a-number-at-a-specific-position-are-on-edge-case-safe-with-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95598/how-to-check-whether-only-2-bits-in-a-number-at-a-specific-position-are-on-edge-case-safe-with-php</guid>
<pubDate>Fri, 03 Apr 2026 15:19:42 +0000</pubDate>
</item>
<item>
<title>How to write 4 different functions that check if a number is a power of 2 in PHP</title>
<link>https://collectivesolver.com/95548/how-to-write-4-different-functions-that-check-if-a-number-is-a-power-of-2-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95548/how-to-write-4-different-functions-that-check-if-a-number-is-a-power-of-2-in-php</guid>
<pubDate>Thu, 02 Apr 2026 07:35:52 +0000</pubDate>
</item>
<item>
<title>How to write 6 different functions that accept 5 or 7 and return the other number, without using if,switch in PHP</title>
<link>https://collectivesolver.com/95510/how-to-write-6-different-functions-that-accept-5-or-7-and-return-the-other-number-without-using-if-switch-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95510/how-to-write-6-different-functions-that-accept-5-or-7-and-return-the-other-number-without-using-if-switch-in-php</guid>
<pubDate>Tue, 31 Mar 2026 18:29:04 +0000</pubDate>
</item>
<item>
<title>How to copy bits from M into N (numbers) between bit positions i and j (edge‑case‑safe) in PHP</title>
<link>https://collectivesolver.com/95480/how-to-copy-bits-from-m-into-n-numbers-between-bit-positions-i-and-j-edge-case-safe-in-php</link>
<description></description>
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<pubDate>Mon, 30 Mar 2026 06:34:38 +0000</pubDate>
</item>
<item>
<title>How to get the word before the last word from a string (edge‑case‑safe) in PHP</title>
<link>https://collectivesolver.com/95441/how-to-get-the-word-before-the-last-word-from-a-string-edge-case-safe-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95441/how-to-get-the-word-before-the-last-word-from-a-string-edge-case-safe-in-php</guid>
<pubDate>Sat, 28 Mar 2026 16:19:43 +0000</pubDate>
</item>
<item>
<title>How to find the median among three given numbers in PHP</title>
<link>https://collectivesolver.com/95372/how-to-find-the-median-among-three-given-numbers-in-php</link>
<description></description>
<guid isPermaLink="true">https://collectivesolver.com/95372/how-to-find-the-median-among-three-given-numbers-in-php</guid>
<pubDate>Thu, 26 Mar 2026 17:11:16 +0000</pubDate>
</item>
<item>
<title>How to find the smallest number greater than a given number, using the same digits in PHP</title>
<link>https://collectivesolver.com/95335/how-to-find-the-smallest-number-greater-than-a-given-number-using-the-same-digits-in-php</link>
<description></description>
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<pubDate>Wed, 25 Mar 2026 15:32:37 +0000</pubDate>
</item>
<item>
<title>How to produce a sequential count in octal, starting at zero in PHP</title>
<link>https://collectivesolver.com/95305/how-to-produce-a-sequential-count-in-octal-starting-at-zero-in-php</link>
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