PHP Lecture 1 - String, Constants, Arrays, Operators
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PHP is a server-side scripting language that allows developers to work with strings, constants, operators, arrays, and superglobals. It presents an overview of PHP string functions like str_word_count() and strrev(), how to define constants, the different types of operators in PHP like assignment, comparison, and arithmetic, the three types of arrays, and array functions for sorting. The document also lists the PHP superglobal variables that provide information about headers, files, environment variables, cookies, and more.
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How smart campaign queueing works, how flow steps are prioritized, and configurations that slow down smart campaign processing.
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Generally recommended timelines for reviewing instance performance: walk away from this session with a guideline of what to review in Marketo and how often to review it.
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For more Alluxio Events: https://www.alluxio.io/events/
Speaker:
David Zhu (Engineering Manager @ Alluxio)
Storing data as Parquet files on cloud object storage, such as AWS S3, has become prevalent not only for large-scale data lakes but also as lightweight feature stores for training and inference, or as document stores for Retrieval-Augmented Generation (RAG). However, querying petabyte-to-exabyte-scale data lakes directly from S3 remains notoriously slow, with latencies typically ranging from hundreds of milliseconds to several seconds.
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- The architecture that enables Alluxio’s throughput to scale linearly with cluster size, achieving one million queries per second on a modest 50-node deployment, surpassing S3 Express single-account throughput by 50x without latency degradation.
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PHP Lecture 1 - String, Constants, Arrays, Operators
- 4. String str_word_count("Hello world!")2 strrev("Hello world!")3 str_replace("world", "Dolly", "Hello world!")4 strpos("Hello world!", "world")5 strlen("Hello world!")1
- 6. Operators Assignment operators2 Comparison operators3 Increment/Decrement operators4 Logical operators5 Arithmetic operators1 String operators6
- 12. String operators
- 13. Array • Indexed arrays - Arrays with a numeric index • Associative arrays - Arrays with named keys • Multidimensional arrays - Arrays containing one or more arrays
- 14. Array function • sort() - sort arrays in ascending order • rsort() - sort arrays in descending order • asort() - sort associative arrays in ascending order, according to the value • ksort() - sort associative arrays in ascending order, according to the key • arsort() - sort associative arrays in descending order, according to the value • krsort() - sort associative arrays in descending order, according to the key
- 15. Superglobals • $GLOBALS • $_SERVER • $_REQUEST • $_POST • $_GET • $_FILES • $_ENV • $_COOKIE • $_SESSION
- 16. QUESTION ?
- 17. THANK YOU